Nancy has a new math channel, NancyPi!

Published on January 17, 2018 by

Hi! It's Nancy, formerly of MathBFF. This is my new channel! All my new videos will be here! I'm really glad to see you found me over here. Please subscribe here for all my new videos, and please spread the news! I'm moving to this new channel and will be here from now on. Thank you all for your support. Lots of love to you guys 💗

Edited by Miriam Nielsen of zentouro:

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Advertise here. Telegram, Signal - Call/message +1-868-308-4028.


  • Dani Alves 5 years ago


  • Gaby Garay 5 years ago

    Omg 😍 yaaassss!

  • Dannky 12 5 years ago


    • FAHAD RAFI 5 years ago

      Dannky bhi!!!!

  • bob chang 5 years ago


  • José Enrique Tirado 5 years ago

    So freaking awesome!!!!

  • Nomon Munir 5 years ago

    math is about to get a lot hotter

    • San Samman 5 years ago

      I got a lot shittier doing math 🙁

    • Emi Garo 4 years ago

      She is more like my league

    • Laughing Monkey 4 years ago

      Nancy Is the hot math tutor we never had

    • Nomon Munir 4 years ago

      i know right i’ d actually focus this time around 😉

    • Paul Ashford 4 years ago

      yes….and brains

  • Adrian Arjoon 5 years ago

    Good to see you back, your videos helped me through Calc I, II and Differential Equations. So thank you and I wish you the best with this channel:)

    • San Samman 5 years ago

      Adrian Arjoon, there are good channels for advanced math too:
      Dr peyam’s show.
      flammable maths.
      khan academy(lol I guess you already know that one)
      Krista king.

  • Josue Becerra 5 years ago

    Do differential equations please

    • San Samman 5 years ago

      Josue Becerra go to mathbff , she has a lot of calc. stuff there

  • Stella 5 years ago

    omg finally you came back !!! Your channel helped me a lot and I was waiting for you so far😭

  • Delete 5 years ago

    Hopefully the videos won’t be months apart!

  • Delete 5 years ago

    What about multivariable calculus?

    • Tim Rubin Halcomb 4 years ago

      If you have a direction vector, and it represents a change of direction over a simple smooth curve. Take the derivative of it, and you’ll get the velocity vector. Divide the velocity vector by its magnitude and you’ll get the unit tangent vector. Take the derivative of the unit tangent vector, and divide it by the magnitude of the velocity vector, and that will represent the curvature of the direction vector. If you choose a circle, then r(t) = rcos(t) i + r sine(t) j.. Using that information, you should be able to derive the curvature of the circle which will be 1/r. Large circles have small curvatures; whereas, small ones have large curvatures. Certainly, a small circle will turn around much faster than a large one right? Ugh! What’s Multivariate Calculus? LOL

  • X21 5 years ago

    You’re truly the best and your videos are extremely helpful, can’t wait.

  • Blunt1st 5 years ago


  • Erick Martinez 5 years ago

    hey queen welcome back!

    • matthew arnold 5 years ago

      Yassss queeen

  • Fabio M 5 years ago

    We missed you so much!! Please come back soon!!!

  • PALM TREE 5 years ago

    Can you make a video about parametric form?

  • Rod_ Xav 5 years ago

    Welcome back, lomg time no see!!

  • djheckler92 5 years ago

    The savior has risen

  • sgedeon01 5 years ago

    Awesome. I love Nancy. Nancy, Krista King and Patrickjmt are the best calculus teachers

  • Monsieur Pickles 5 years ago

    BTC is crashing, this is the best thing i’ve heard all day!

    • Clemens Dotson 5 years ago

      My financials are screwed and I cant retire, but I agree.

    • God 5 years ago

      BTC is always crashing though

    • Ben 5 years ago

      Clemens Dotson If you can’t retire because of a temporary dip in BTC, you have way too aggressive of a portfolio.

  • Upfrontgameplay 5 years ago

    Nancy I just got a 💯 on my Calc test today thanks to your help with applications of derivatives and all that stuff! You’re the greatest 👍🏼

  • Ruminating15 5 years ago

    NOt even in school anymore, but still watching.

    • Oscar Duran 4 years ago


    • Siddhi Vinayak Misra 4 years ago

      Ruminating15 same here big fan of Nancy

    • Chief Louie 3 years ago

      I am 60 and still interested.

    • Chirag Sharma 2 years ago

      so i ooooo she’s cute

  • D S 5 years ago

    I don’t know if I’m past the point in my education where you’re videos will be able to help, but you helped a ton when I was in calc.

    • SuperMafioBrother 5 years ago

      D S I just started calc earlier this month and she’s been a good help so far. Hopefully she’ll have something to supplement your needs.

  • Guilherme Moresco 5 years ago

    Welcome back and thank you! Your content is truly helpful

  • Science Power 5 years ago

    Yes, she is back!!!

  • Patricia Rusu 5 years ago

    So happy you’re back!!! hope to see some linear algebra videos 🙂

  • Ludwig Spiegel 5 years ago

    Nice to see you again! Happy New Year Nancy

  • Damm ARath Dark Music 5 years ago

    I love this channel. Its better so start with some algebra.

  • GameMaster0097 5 years ago

    Welcome Back! Thank You so much for all the help you gave me throughout my Calculus courses.

  • Cameraman 5 years ago

    Welcome back!

  • Math and Logic 5 years ago

    Wasn’t this going to happen 8 months ago? What happened?

  • Mackisig 5 years ago

    you are smart and beautiful. are you married yet?

  • Ibrahim Chalhoub 5 years ago


  • Ivonne 5 years ago

    Yay! Glad you’re back, today was my first day of cal 2!
    Question tho, I thought your channel was Mathbff?? How come you’re not uploading there ? : o

    • Michael MM 5 years ago

      Ivonne The theory that many of her long time fans have come up with is that she was scared away by inappropriate pigs commenting in unfortunate ways.

    • Ivonne 5 years ago

      Michael MM oh no! I noticed some of the comments were gross, I’d be bothered by that too!

  • hugoacetx 5 years ago

    Awesome!!! Glad you are back Nancy :)) couldn’t have gotten my A in Calculus without you and a few other great folks on here. You guys rock!!

  • Sam Heinrich 5 years ago

    Missed you Nancy! Glad your back! You saved me and got me through algerbra 2 😛 One request I would have is maybe consider potentially making a video playlist specifically for targeting SAT common types or problems and how to tackle each the most effectively! I am sure plenty need help with those tests 😛 like myself!

  • Dharamveer Singh 5 years ago

    Calculus 2 videos please! Glad you are back.

    • NancyPi 5 years ago

      Thank you, Dharamveer! Which Calc 2 topics?

    • Dharamveer Singh 5 years ago

      NancyPi Partial fractions, trig substitutions, infinite series and sequences, polar coordinates.

  • Leen 5 years ago


  • JonoFlex 5 years ago

    Nancy is the GOAT!

  • Nock Nock 5 years ago

    yes finally

  • Xtyles Garcia 5 years ago

    She nos de wae, brothas.

  • Alden Lambert 5 years ago

    Do you have a math degree? I really need help with learning induction proofs for my computer science class.

    • NancyPi 5 years ago

      Physics. Very interesting…..which book do you use for that class?

  • Aakash Kulkarni 5 years ago

    I’m a sophomore in High School, can you show me how to do partial differentiation? I know calculus pretty well!

  • aryan parashar 5 years ago

    Thank you for uploading.. waited so long.

  • Ruth Meletz 5 years ago

    can you please do trigonometry??

  • CapnMcMuffin 5 years ago


  • chunkymonkey 5 years ago

    Holy shit, you’re alive.

  • محمود الجاسم 5 years ago

    I love Mathbff channel and I wish to make a lot of lessons and thank you for Miss

  • Vlad Trishch 5 years ago

    So nice to see you again!

  • John Esposo 5 years ago

    I now regret dropping math courses

  • quercus190 5 years ago

    …And then she disappears again… To reappear in a year with another “nice to see you” -video with no background given. I do appreciate her videos, but it has been a little strange.

    • everyoneelsegotthego 5 years ago

      The words you are looking for are the ones relating to “good luck “ and “welcome back “, liberally sprinkled with thanks for past assistance. I’m pretty sure she has a life and doesn’t owe us anything.

    • quercus190 5 years ago

      I didn’t mean to be rude, but I am sure some of us have been somewhat confused/curious due to these different youtube accounts and a new partner, whom we ended up seeing pretty much in just a “trailer” and a “sample” video. I genuinely hope that Nancy is doing well and that NancyPi will take-off. With best wishes to her!

    • quercus190 4 years ago

      everyoneelsegotthego: See, this is what I mean, now it has been a month…

  • Keith Sum 5 years ago

    Shes back boys!!!

  • Scott A. 5 years ago

    Super excited and thankful to have you back!

  • Sal7_one 5 years ago

    We’re glad you’re back sister 😀

  • Amrit Chandhok 5 years ago

    Could you please cover multivariable calculus

    • NancyPi 5 years ago

      Which topics are you thinking of?

  • Solid Chrome 5 years ago

    You’re amazing! With your help I was able to pass math and get my bachelor in Engineering. Now I’m doing my master and the math got a lot harder, will definitely keep an eye out on this channel! Again: THANK YOU!

  • Ayaan Shaikh 5 years ago


  • Polly P 5 years ago

    Statistics please. Thank you. 👍

  • Carl Johnson 5 years ago

    Can you do questions related to permutations and combinations? Also how come you left Mathbff?

  • Veronica Gonzalez 5 years ago

    Can you do chemistry?

  • ᗴnergy--ᑎinja 5 years ago

    Can you do Discrete Mathematical topics? Thank You

  • Dayron Films 5 years ago

    absolute best teacher ever

  • Da'ud Sakriye 5 years ago

    Thanks you how you share mathematical knowledge, I am ever
    happy to run your videos, because mathematics is a part of my life.

    • NancyPi 5 years ago


  • PhantomWorkz 5 years ago

    Welcome back Nancy 😀 Your videos really help I can’t wait for the new ones

  • Jordan 5 years ago

    I always like touching base with my maths because its fun and watching your videos is so entertaining and helpful thanks!

  • BobC 5 years ago


    Presenting math via video is tough because, unlike a teacher in the classroom, you don’t know (and can’t fix) the moment when your audience gets lost. Except for Nancy: I’m consistently impressed how she always anticipates where folks may have trouble, and does both careful repetition combined with insightful examples to always get even the most difficult concepts across. Also present when needed are careful pauses, to let things sink in a bit before rushing on. So very perceptive of her audience.

    What helps make the math and pedagogical content work is Nancy’s presentation technique. First, her voice: A calm, unrushed and unaccented voice with very clear diction and enunciation. And, occasionally, a touch of irony, sarcasm, or just plain snarkiness to spice things up. Second is her clear handwriting and careful use of colors.

    Finally, the editing: I especially like small details the whirring audio used during fast-forwarding through extended periods of writing (without commentary). Very well done.

    I’m so glad Nancy’s back!

  • No One 5 years ago

    Damn her teeth look like she just came out of colgate comericial.

  • Nickdacooldude 5 years ago

    You should do ASMR

  • everyoneelsegotthego 5 years ago

    Wonderful to have you back. You have the best math tutorials on YouTube. Thank you for everything!

  • Igotfe atured 5 years ago

    Why the new channel though?

  • Clinton Campbell 5 years ago

    Keep it up! I have always recommended you to all of the students that I tutor for supplementary help. You’re excellent!

  • !!!!???? 5 years ago

    Hell yeah Nancy welcome back. Missed ya

  • Daniel Jones 5 years ago

    Why tho?

  • jojojojo 5 years ago

    Can’t wait to learn more! 🙂 please do. This video just made my day. More videos to come!

  • Brandon Gonzalez 5 years ago

    I’m very glad you’re going to continue (:
    I hope things have been well and you’ve had happy holidays. Thank you for your help.

  • TAWFEEQ TAWFEEQ 5 years ago

    Hey ur sooo damn cute….can I jus get ur number personally…..?

  • 7949RAJ 5 years ago

    We are happy to see you too nancy

  • lewEEsuh 5 years ago

    thank you for helping me take better notes than my teacher could ever teach! now i am getting 105’s on all my tests 🙂

  • Safal Shres 5 years ago

    ayayyayayayayay NANCY IS BACK!!!!!!!!!!!! finally, waited enough!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! <3<3<3<3<3<3<3 Your videos were amazing!!!!!!!!!!!!!!!!

  • J.R.R Tolkien 5 years ago

    have numbers changed? has there been some radical new discovery that makes your old channel obsolete?

  • Young Blood 5 years ago

    Can you please do a review on the Algebra I Regents Common Core? Roughly 3/4 of my entire class is currently failing because our teacher cant explain to us a lot of the topics on it such graphing inequalities. More than half the kids who take this exam in New York fail it or get below a 70. I think you’d be helping me and thousands of other kids if you can review some of the topics on it. Thank you so much! Also your previous channel covered many topics that helped me pass my finals so thank you so much!

  • BLNK. 5 years ago

    Thank God you are back , your video helped me alot , what happen to your old channel ?

  • Manoj Mathew 5 years ago

    Hi Nancy, Nice to see you back with new maths videos. The ocean of mathematics is full of amazing things and you make them more interesting and beautiful.

    • NancyPi 5 years ago

      Manoj you made my week, with this comment 💚

  • Bouncy 5 years ago

    Welcome back Nancy ❤️

  • Firelord Ozai 5 years ago

    I love you .

  • Igotfe atured 5 years ago

    Yeah I’m going to subscribe. Pretty helpful. Just found a bunch of videos from your old channel about topics I needed to understand, convenient. Pleasantly surprised by the quality. I was greeted by a warm personality. Don’t know why but you seem nice, maybe from the way you explain things calmly. Kind an odd thing to pick up on when someone is explaining maths to you but oh well. I’m from belgium and a lot of dutch math videos are unclear. They explain it as if you have to follow their train of thought telepathically. That being sad, you explain it very clearly and seem to relate to and understand where people usually have trouble following. So good job an keep up the good work. And also, this might be kind of important, I would upload a video to your old channel announcing that you have a new channel. Very confusing and unclear, a lot of people seem to still be subscribed to your old channel absolutely oblivious to the existence of the new one. I really don’t read the description on most videos, I don’t think a lot of people do. Only reason I read the description that stated that there was a new channel was because I was actively looking for any sign that you announced the move. Just my feedback.

  • Bba xX 5 years ago

    Hey my love;)

  • Ri5004 5 years ago

    Awesome. But you should be on your old channel where everyone remembers you 🙁

  • Strong Medicine 5 years ago

    Nancy, so glad that you are back making new videos!

    • Bran' the Man 5 years ago

      LOL I watch you videos!

  • ironant 5 years ago

    Nancy… i’m not gonna lie. I’ve fallen in love with you XD

  • Georgios Baglaridis 5 years ago

    Glad you’re back Nanci, wish you the best luck !

  • Christopher Daniel 5 years ago

    Got hooked on mathbff, and will check out this new channel as well. Given the need to review some basics, however, is there a way to sort these presentations in order to achieve a logical progression?

  • 1921knox 5 years ago


  • Ryan White 5 years ago

    Why the new channel?

  • Nickolaus Lim 5 years ago

    I’d love videos on solids of revolution. Disk/washer and slice method..

  • Jm Del Rosario 5 years ago

    Nancy!! I just aced my test today thanks to you!!!! THANK YOU SO MUCH

  • SuperShana97 5 years ago

    Wow, I just subscribed your other account yesterday and just found this! I’m glad your back and hopefully you can upload calculus 2 and 3. 🙂

    • NancyPi 5 years ago

      Thank you, Shana 💛Which calc 2 and 3 topics do you wish I had?

    • SuperShana97 5 years ago

      NancyPi Well I haven’t got up to Calc 2 yet but you can do like application integration, infinite series.
      Also, can you upload for related rates and optimization topics?

  • Richard Pilhofer 5 years ago

    I am also excited for your new videos

  • Max π 5 years ago

    Welcome back Nancy! ☺️

  • Cynthia Mih 5 years ago

    Beauty and Intelligence – Nancy, you got it all !

  • Ren 5 years ago

    im taking a college calculus 1 class and im dying already and I’ve only had two classes..PLEASE MAKE BASICS OF CALCULUS VIDEOS AND LOTS OF VIDS ON CALCULUS THANK YOU YOU ARE AMAZING

  • Rayhan Jinah 5 years ago


  • Sebastián Ocampo 5 years ago


  • Harvey Arizala 5 years ago

    Hi Nancy! Can you please solve some topics on Differential Equations and Advanced Engineering Mathematics? You discuss it ever so smoothly. Thank you!

    PS thank you so much for returning on YouTube. You’re gonna be a lot of help!

    • NancyPi 5 years ago

      thank you Harvey! 🙏 Which Advanced Engineering Mathematics topics?

  • Dhwani 5 years ago

    Thank u so much! So excited to have u back Nancy can’t wait to learn math from the best of the best

  • Luis Ventura 5 years ago

    Nancy, thank you for helping me pass my first semesters of math!!!

  • Ahmed Jendeya 5 years ago

    Hey Nancy the great .. could u pls tell me where did you learn motage/video editing?

  • babalus101 5 years ago

    Woop woop! You’re an absolute gem. Thank you sooo very much for all of your help ^_^

  • EVERYDAY GAMING 5 years ago

    Nancy can you show me how to do linear equations i didint care about math but i want to learn how i cry bc i dont get it

  • Nick Romero 5 years ago


  • Ovi IT 5 years ago

    Nice work! You made THE BEST videos with excellent explanations. Please continue to make the World a NICER place! Thank YOU so much!

  • Muzzamil Abbas 5 years ago

    Nancy really obliged with the way you explain things. Hope you go higher!

  • Jams Reality 5 years ago

    Im here for the math

  • Albert Lewis 5 years ago

    bae is back !! 🙂

  • giant 5 years ago

    Very glad you are doing videos again. Your explanations are very simple and clear with solid examples. Better than many textbooks

  • Parker Hood 5 years ago

    Discrete math please

  • brothertim 5 years ago

    Thanks for all the time you put into teaching math. I hope this new channel is even more successful than mathbff

  • Los Simpsons 5 years ago

    Maybe you all know, but what happened to the old channel?

  • Jerry Gundecker 5 years ago

    Nancypi binomial woman of mystery!

  • Shiying Lim 5 years ago

    Your differentiation explanations on your former channel helped me so much! Can’t wait for new vids here 🙂 sending nothing but love to you 🙂

  • King of Dumb 5 years ago

    do videos on algebra 2 fuck all the rest I need to pass math

  • Sciphere 5 years ago

    WELCOME BACK!!!! Can you do some more Trig videos?

  • Julian Mungarro 5 years ago

    My Queen !

  • Bill Gilbride 5 years ago

    Nancy, have you looked at Houdini for visualizing your math. It’s free. It’s the best math software out there. Great to have you doing more videos.

  • sirmovielover 5 years ago

    Will you do a video on the fundamental theorem of calculus?

  • Ylva Eriksson 5 years ago

    Thank you! I am so inspired to make own videos for my students, in Swedish. I know that we learn in different ways, I also work as a teacher for students with special needs, and I learn the best when I can see the teachers face mimic and body language. Please go on doing what you do!

  • Madeline Abigail 5 years ago

    Yeayyy nancy is back…. Thanks for coming back…

  • Spike Spiegel 5 years ago

    Im gonna go back to school again

  • NancyPi 5 years ago

    All my old videos will be moving here to NancyPi soon!!  <3 <3

    • Jorge Izquierdo 4 years ago

      When will you be posting your old videos and new videos to this account? It has been a month!

    • etsham basit 4 years ago

      Do matrices

    • Kishore Subramani 3 years ago

      Teach vectors please nancy ☺️

    • Jeffery Smith 3 years ago

      Great job Nancy. Keep putting those videos up. It helps me to show my young daughters that one can be beautiful and still love math.

    • Mir Baig 3 years ago

      @San Samman so Was tgere any Previous channel of her?

  • DarlinxJen 5 years ago

    I just cried! Nancy you helped me with my math and when I haven’t seen you post anything it broke me. Your the only person that really helped me understand the material when my professor’s couldn’t. Don’t ever leave us again!!!

  • IAmProof ThatGreatnessCanBeEncapsulatedInOneFormWhichIndeedTakesTheAppearance OfAGreekAdonis 5 years ago

    You helped a lot with math in college for my econ degree.

  • Juan Lavariega 5 years ago

    Am I the only one who is suddenly really excited to learn math?

  • Venus Z 5 years ago

    I’M SO HAPPY YOU’RE BACK!! You have NO idea how many times you’ve saved my butt from failing. You’re a blessing!

  • Holly Menna 5 years ago

    Thank you! Looking forward to Calculus help. The lecture doesn’t cut it. Oh, and reading the book. Good luck with that!

  • arrrman 5 years ago

    Hey Nancy, love your videos. May I ask, why the channel change — why start your subscriber counter again from zero? Seems unnecessary unless you’ve lost access to the google account, or there’s a saboteur withholding access. Everything ok?

  • Blackrew 5 years ago

    The legends are true. She has returned.

  • Erick Garay 5 years ago

    Hey babe I missed you, please don’t ever leave me like that again 😘 p.s I’ll pick up the kids from school tomorrow. Love you, bye <333

  • CHURINDOK 5 years ago

    So she still doesn’t have a ring on her finger. So I’m not mathematically eliminated from dating her yet. Cool.

  • Gan Huang 5 years ago


  • Carlos Arredondo 5 years ago

    Thank you for coming back and I was just wondering if whenever u have the time if u could do a video on solving quadratic equations using imaginary numbers

  • Johnny Huff 5 years ago

    Honestly Nancy, I have watched so many of your videos…you have really been a huge help to me in getting through Calculus…I really appreciate the work you do, and so glad you are back with a new channel and will be doing new videos!!

  • tiramisu 5 years ago

    Glad you’re back. I need a break from Sal.

  • LandyXB 5 years ago

    Why abandon your channel with 400k subscribers?

  • Math On The Go 5 years ago

    Looking forward to the new videos. Subscribed so I’ll be notified!

  • luke p 5 years ago

    Can you please do a video on optimisation methods for rates of change?! Thanks love your videos!! xx

  • Jim Lunde 5 years ago

    Yea!! Great to see you again.

  • matthew arnold 5 years ago

    These vids have single-handedly gotten me through college.

  • pinky 5 years ago


    • rehan gaming r .g 2 years ago

      Hiii Corona virus

  • Bar Bell 5 years ago

    Your videos are so helpful

  • Seven 7 5 years ago

    Hope you will post every week, God bless you

  • Fadhel Gargouri 5 years ago

    im glad that you are back <3 i love you baby

  • martel alexandre del colle 5 years ago

    I think will be nice if you use facebook as well

  • Archishman Biswas 5 years ago

  • Jadiel Maldonado 5 years ago

    Thanks your videos help me a lot.

  • Kenny Brooks 5 years ago

    Why a new channel?

  • L& L 5 years ago

    Thank you Nancy, you are the best!

  • Dragonlord 5 years ago

    may your calculus videos be as populated as the limit of e^x from the left

  • flyffast 5 years ago

    NancyPi, how do you manage to write on your videos? Our whole calculus class has been watching your videos and have always been crafting theories on whether you write with a mirror or backwards.

  • Renat 5 years ago

    Why new channel?

  • David M 5 years ago

    Ahhh! You’re back!

  • PhantomWorkz 5 years ago

    Can we get an algebra matrix video in the future?

  • Aalu Bengan 5 years ago

    why dont u go back to mathbff u have 100k subscriber there n millions of view

  • Izzmil Bukhary 5 years ago

    you helped me alot!

  • Jadiel Maldonado 5 years ago

    thank you

  • William Stratton 5 years ago

    Woo! Thank god someone can get me through calc 2 :’D

  • Ismail Ismaili 5 years ago

    i really thank you so much for your old channel and also this new one your videos really make sense to me thank you

  • Kitsune 5 years ago

    Why did you transfer channel :O

    Keep up the good work!

  • kaaylashae 5 years ago


  • valeria collazo 5 years ago

    So happy you’re back! you’re the best!

  • Michael Mills 5 years ago

    But why did you change channels

    • EhCloserLook 3 years ago

      THIS is what I am desperately wanting to know as well! Someone please explain!!!

  • Lowtech 5 years ago

    You rock! Thanks for the tutorials.

  • A-mirrorvlogs 5 years ago

    Love your videos, they help so much! And, they are right to the point when you don’t have a lot of time!

  • Aaron Loomis 5 years ago

    Nancy 2.0 yeeeeeessssssss!

  • J M D 5 years ago

    I’m an engineering student and I need help with Limits… 🙁

  • PooNoose 5 years ago

    Why do you have a new channel?

  • Aaron Rappleyea 5 years ago

    Why did you have to put these videos on a new channel. Mathbff was fine to me. I must be missing something.

  • jacksonhayes04 5 years ago

    thats hawt

  • Mr Eccentricities 5 years ago

    Why do you have a new channel? Also was it a clusterfuck getting back here XD

    • NancyPi 5 years ago

      hahaha it really was 😉

    • Mr Eccentricities 5 years ago

      NancyPi Hey, don’t wink no one likes a tease XD 😉

  • natsu dragneel 5 years ago

    hi nancy, your videos were amazing, it helps me a lot on my studies. can you teach how to compute the probability of an event to happen too???

  • Phlem 5 years ago

    Nancy !!!!!!!!

  • Cris Cardenas 5 years ago

    ur videos r so helpful they helped me a lot

  • Suki Suuuki 5 years ago

    yay so excited to see ur videos i really learned a lot from u thank u soooo much keep going❤

  • J. Altamirano 5 years ago

    Welcome back Nancy !!
    Your math explanations are concise and to the point.

    Thank you a tonne !!

  • Shaun Donovan 5 years ago

    Thank you Nancy for doing these videos. You do a great job explaining difficult math problems which has helped me so much. Just wanted to say thanks.

  • Paul Edwards 5 years ago

    Your amazing

  • Matthew Davis 5 years ago

    So excited that you’re back. You and PatJMT are my Dream Team.

  • austin sandoval 5 years ago

    lets do this ! u helped me get my associates degree but I got sent back to advanced algebra after college courses didn’t meet criteria when I switched to UW Milwaukee can’t wait to fine tune once more

  • Ryan S. 5 years ago

    You’re back! Multi-variable calculus and differential equations, please.

    • NancyPi 5 years ago

      Which multi-variable calc topics?

    • Ryan S. 5 years ago

      My professor said she’ll start partial derivatives next class and move on to integration in about two weeks.

  • Serenity Edits 5 years ago

    Would wife up ReAl QuiCK

  • Zer01 5 years ago

    No new videos?

  • Mohan Gandharkar 5 years ago

    Nancy is comming…..

  • AnselAlly 5 years ago

    You never age.

  • Stanley Rene 5 years ago

    Do Integration by partial fractions video! The other channel doesn’t have anything on it.

  • Nate Burrito 5 years ago

    You still look the same after years

  • Richard Head 5 years ago

    I missed you Nancy!
    I thought maybe you got recruited by Elon Musk to calculate interplanetary trajectories for SpaceX. LOL
    Great to see you though!
    I activated the alert bell to get all of your future videos.

  • MegaOmer2 5 years ago

    Make a vlog channel too

  • Oscar balderas ponce 5 years ago

    😳 crushing

  • Danneo 5 years ago

    Last year of high school for me, LETS GO!!

  • Enrique Rodriguez 5 years ago

    Hi Nancy, any new videos lately?

  • Jo Cr 5 years ago

    Holy shit this is so awesome!

  • SteelRainz1 5 years ago

    Why did you give up your old channel though? Did you sell it to someone or what? You had like 400,000 subscribers. Why start over?

  • John Valdez 5 years ago

    Why did you decided to move channels? I mean the other one already had a strong network and subscribers, just curious!

  • Matthew Tafoya 5 years ago

    just started stats classes. do you have stats lessons and do you use R studio in any videos ???

  • Lilith Melantha Estrella 4 years ago

    You are more brainy than our maths teacher (and definitely more pretty) 🙂

  • Rogers Pires 4 years ago

    thx to come back! can u upload all of ur old videos over here? 😀

  • Almighty . Ayy 4 years ago

    ♥️♥️♥️♥️✊🏽😜 thank you sooo much Nancy your the best math teacher ever

  • BAME DEIYDJI 4 years ago

    U help me with Math alot i just found out about this channel

  • Santiago Bron 4 years ago

    Oh man

    This should be an interesting comment section.

  • Ernie Peters 4 years ago

    Love your videos. If I may give one suggestion for future videos.. could you please at the beginning of your videos, give a brief example of a real life application for a given theorem? In eg. ‘ Logarithms are this and they can be very useful when trying ro figure out that’

  • Peace Samuel 4 years ago

    what happens when the denominator is not a quadratic equation, will i still set it to zero? I hope to hear from you soon. thank you for the videos, they are really helpful, briefly explained and easier than i thought. keep it up the good work of sharing the knowledge you have with others


  • George Constantino 4 years ago

    Way better then person’s my math lab video. Thanks for using different colors ink when solving problems.

  • A quien pueda importar 4 years ago

    Whatever you do, it works. Whenever I’m doing a math test these days, I have your voice in my head explaining what to do. So thank you, Nancy. I hope you enjoy what you do, because you do a lot of good for a lot of people.

  • rohit janu 4 years ago

    nyc dp yr 😉😉

  • John Doe 4 years ago

    you are the best i love your channel.

  • Imran Hossain 4 years ago

    Welcome back.your videos was really helpful.

  • Carlos Falcon 4 years ago


  • tictoc544 4 years ago

    thanks for your channel
    what did u study?

  • ZENNology of Everything 4 years ago


  • Ammar AlShaar 4 years ago

    Love uuuu I missed U I will half fail without ur videos

  • Wessam Hamadneh 4 years ago


  • D B 4 years ago

    Nancy, I love your videos.  I am taking college algebra online.  The course is difficult since I do not have an instructor.  Guess what, I found one and her name is Nancy.  I love the way you explain the math problems.  You give the reason why something can or cannot be!  Thank you so much.  You have helped me so much already.  I know it takes time to create these videos, but from one avid fan!  I appreciate you!!!!!

  • NovemberFlag __ 4 years ago

    Why the move?

  • Kelvin 4 years ago

    thanks nancy really looking forward for some videos, specially trig ones

  • aniket kushwaha 4 years ago

    thanks miss Nancy for coming back thanks alot

  • Linkplayas YT 4 years ago

    ur so sexy

  • Jhaala 4 years ago


  • Corey Carter 4 years ago

    Every college students savior has returned, she will help us slay the math dragon!!!

  • Hayden West 4 years ago

    You Rock!

  • A D 4 years ago

    i wonder why mathbff removed (?) her she so gooood tho

  • Gregory Alexandr 4 years ago

    This is a family event for us and I really appreciate sharing your knowledge … Thank you.

  • Steve Solis 4 years ago

    Awesome! I needed some help on some equations for the math portion to get my teaching credential (along w/other items). Also, I appreciate you taking the time to make sure the lighting, sound and your studio setup were just on point. Thanks so much and continued success! —Steve

  • TurdFurgeson571 4 years ago

    Every time I watch one of Nancy’s videos, Elton John’s “Someone Saved My Life Tonight.”

  • Rehannah Baptiste 4 years ago

    Yay I’m so glad you’re back Nancy! ❤

  • 94cd5 4 years ago

    A lot of helpful videos that go a long way helping me on my math journey. Thanks for your work.

  • Matt B 4 years ago

    Can you cover linear algebra topics? Possibly multi variable calculus as well?

  • Eric Buffington 4 years ago

    Glad you’re back!

  • GARTH REID 4 years ago

    Glad your back!

  • s ewind 4 years ago

    So glad you’re back. Pretty much the best maths videos out there. (from a grateful student in England).

  • LyricsChannel 4 years ago

    I fell in love with math now.

    Even though I am finish with math

  • Yeny Gomez 4 years ago

    Nancy, may I ask why you had to start a new channel?

  • kabeer ali 4 years ago

    We love you. Please don’t ever stop teaching..

  • Ivan Toledo 4 years ago

    Thank you for sharing your knowledge. It has helped me greatly!

  • Mariah’s Little Lamb 4 years ago

    You’re amazing.

  • Adeel Khan 4 years ago

    Silly question: But, what should an 8th grader do in order to get started with Calculus on Khan Academy? Asked another way, what are the pre-requisites for an 8th grader, for them to get into Calculus via Khan Academy? Many thanks in advance!

  • Brenda 4 years ago

    Is this just for students? I’m older (60 years old) and I am interested in relearning what I used to know as a student. Is this a good channel for my needs? Are there special channels for older people wishing to brush up on their education?

  • wajih 4 years ago

    How did u get into mit?plz tell

  • Andres Cubillos 4 years ago

    Jesus Christ you guys are rude

  • Ashski 4 years ago

    Hi Nancy, I am Engr. Towhid.Can I get your mail address NANCY to communicate with you

  • Lorenzo Abuzo 4 years ago

    you know solving concrete mathematics?

  • Laura Agha 4 years ago


  • SAMVEL VARDANYAN 4 years ago

    Missed you. Welcome back

  • Maggie Y 4 years ago

    OMG Nancy!😱😱 I am ecstatic to see your channel. I have been searching to see if you have a new channel and I couldn’t believe my eyes this morning when I goggled mathbff and saw your new channel. I am trying to pass my Pre-calcus, hope there will be some videos on those subjects. Thank you!🤗🤗🤗

  • Awais Fenrir 4 years ago

    didn’t she sound a lil sarcastic!! ◔̯◔

  • babysealclub11 4 years ago

    I can move on with my life now. 👍

  • Kriton Tornaritis 4 years ago

    My dad loves you

  • Lebogang Moloto 4 years ago

    I am so excited! Thank you so much Nancy!

  • Peter Webb 4 years ago

    Hey, lady! I just wanted to give you a shoutout. I’m taking a calc class after 8 or 9 years of no math whatsoever, so thanks so much for the help! Keep doing what you’re doing. You’re a good teacher.

    • Peter Webb 4 years ago

      For real though. I took a pretest for the midterm and got ~40 or so. I got a 98 on the midterm last week.

  • gmctrk63 4 years ago

    Hey Nancy, Glad you’re doing vids again. There were no computers when I was in high school,( Yep, I’m old). Because of you, I was able to help my grandchildren with their math homework. One is graduating high school this year and the other is in the 7th grade. Both make A’s and B’s in math. Now I’m helping my Son-in-law who is getting a degree in robotics. Thank You for helping me, help them.

  • iiimusika 4 years ago


  • OVOXO Collection 4 years ago

    Please do more integral problems and basically Calculus 2-3 material. abs max and min with constraints, local max and min 3 dimensions, vectors, integrals trig substitution and integration by parts with trig functions please.

  • Sajjad Ali 4 years ago

    I subed already.

  • Yaron Kohen 4 years ago

    Hi Nancy. I posted my thoughts to you about a month or so ago, when I first saw you. You are so brilliant, and so beautiful. I am so glad you are back. Nonetheless, I am a land surveyor in line for my Land Surveyor Intern exam. I was wondering in that light, would you be able to provide a video(s) on intro Algebra, specifically on how to add, subtract, multiply and divide fractions? Or, a comprehensive look into the mathematics of land surveying. I have found if I don’t know fractions, and how to work them, how will I know how to work through trig, you know. I need help getting just the basics down. Can you help? Sparky…..

  • HP activities 4 years ago

    I missed u so much..I was sad when I didn’t saw u on math bff….but when I got u in your new channel…I’m very happy….I love ur teaching style….thank you…

  • paras verma 4 years ago


  • Daniel Quinn 4 years ago

    Welcome back 😀
    can’t wait for more videos

  • KPOP LIFE 4 years ago

    I love you

  • Cody Brown 4 years ago

    Jesus christ, please upload more videos! Just keep them coming!!

  • mono man 4 years ago

    Welcome back…

  • Audley Reid 4 years ago

    wow!!!! you are back

  • Sunny shah 4 years ago

    WHoa i didn’t know Math was this sexy

  • lasagna 4 years ago

    Yay! You’re back! Please do some differential equations

  • Mohammed Shabeeb 4 years ago

    Engaging and distracting at the same time. Smh.

  • Erin Ashley 4 years ago

    It took me way too long to realize you made another channel ! The link popped up on one of your videos. Super happy you’re still around.

  • VCHRIS 4 years ago

    Merde, now I have to unsubscribe the other and re-subscribe to thisXD

  • ALL CAPS 4 years ago

    We Love You! Put ads on your videos! I want to support you that way. Maybe even patrion!

  • Sumit 4 years ago

    Add videos related to linear algebra and abstract algebra.

  • John Doe 4 years ago

    I’m also happy you are back

  • slowfoods town 4 years ago

    Ohhh she is sooo hottt

  • Dave Buckshaw 4 years ago

    My daughter who is a C/Sgt in Civil Air Patrol, a pilot in training, and just a great kid loves your videos and also loves Danica Keller’s books. Nice to have someone to identify with I suspect. Keep up the good work.

  • joe craddock 4 years ago

    So glad to have you back!

  • xGreenhero 4 years ago

    can you make a video on integration with volumes and shapes and the sort?

  • Anthony Correa 4 years ago

    OMG FINALLY Thank you! You’re videos are so awesome. They helped the most back in the day

  • christos christou 4 years ago

    can’t find your videos of integral !!! please we need you

  • Electromorphous 4 years ago

    Just finished my math exam in grad.

    • Electromorphous 4 years ago

      It was terrible.

  • D really 4 years ago

    This is what is wrong with the world and will never go away. Someone who UNDERSTANDS advanced math and is willing to educate us is played by others for monetary gain and the net result is we live a ” goodfellas” life.

  • Matthew Burlage 4 years ago

    You have been very helpful! Have you considered doing an entire course on, say, calculus. As opposed to specific topic videos? Just a thought.

  • Laura Agha 4 years ago

    You’re amazing😭❤

  • brookefromearth 4 years ago

    Wow perfect timing for me! I just started taking calculus 1 and I stumbled across youd chain rule video, it has been so helpful! I take color coded notes kinda how you were teaching. I’m glad you’ll be making more videos!

  • Deandre Young 4 years ago

    Could you make a video explaining how to find; Marginal cos, Marginal Revenue and Marginal Profit

  • Kelly Witcher 4 years ago

    Yay! I love your explanations… I used them several times in my Algebra II class last year. Glad to have you back!

  • Alok Singh 4 years ago

    Nancy Glad you’r back 🙂

  • jdcamc 4 years ago

    Could you show us how to solve a quadratic formula? I have an equation of 3x^2+13x=30. Thanks!

  • Michelle Orta 4 years ago

    I need to learn Business Cal…. PLEASE!!!

  • TheSleepy Teacher 4 years ago

    Hi :). I’m a big fan of watching and making math videos. I will definitely be checking out your videos. I teach third grade but I love learning new things for myself. I also have a student who is extremely high in mathematics. I want to push him so I may be able to use some of your content. If you ever want to make a math collab video let me know. I’d love to do something with you 🙂

  • Bumblebee 003 4 years ago

    Love to see u back 🙂 💖

  • hussain anwar 4 years ago

    plz upload 10th class match lectures…. i m waiting for your lectutres mam…

  • Robin Vincent 4 years ago

    I have shared your instructions with my students for quite some time. I like the approach you use and your thoroughness. I am retired after 40+ years but tutor weekly. Thanks again!

  • Rosan Karki 18 4 years ago

    no study no english but wathing u

  • habtamu tesfaye 4 years ago

    nancy i am habtamu from ethiopia i want to say thank you for your video

  • hilmi ali omar 4 years ago

    it is easy to understand math by watching your videos thanks alot

  • __댕청222 4 years ago

    선생님 앞으로 영상 많이 만들어 주세요!

  • William 4 years ago

    Nancy! Where are you? From Chicago

  • Nikhil Sharma 4 years ago

    are you married

  • Sharon 92075 4 years ago

    You are a great math teacher Nancy! Love your videos!
    Nice new, classy hair style!

  • BRUNO GRECO 4 years ago

    Excellent videos, great initiative. Congratulations

  • Asahel717 4 years ago

    Nancy, please upload videos on differential equations and Laplace transforms. Thank you.

  • Al Kip 4 years ago

    Your teaching experience is phenomenal! You are just the best. Went from “i hate math to wow, it’s this easy” You are the greatest. Thank you.

  • Steve C 4 years ago

    omg you helped me get through calc years ago

  • Zohan baba 4 years ago

    Your cuteness reason of my killness

  • Fernando Grandas 4 years ago


  • Gangotry Rathore 4 years ago

    you are extremely helpful .. and now i can solve maths with more interest … 😍😍 and u r gorgeous too

  • Samuel Creelman 4 years ago

    Yo nance, u gotten me outta a hole many time thanks for that. Keep that content coming girl, and make some dynamic programming (operation research) and statistic video for ya boi. Time is of the essence but patiently waiting.

  • goku son 4 years ago

    I love you !

  • Joshua Posada 4 years ago

    Planning on doing English classes. Mind letting me know what camera you use?

  • Yen 4 years ago

    AAAAAA I CAN’T EVEN EXPRESS HOW HAPPY I AM THAT YOU’RE BACK! I’m in sixth form right now (UK equivalent to high school I guess) and I’ve been basically relying on your videos to help me get through my first year of Maths and I loved every video and the way you explain and just wished there was more because you can make anything interesting and you’re just such an angel and aaaaaaa thank you for being back I’m looking forward to your new content!!
    And here, big group hug!

  • Thomas Qiao 4 years ago

    why was she gone?

  • Luis Rey Morales 4 years ago

    Hello! Can you do a video on improper integrals? Thanks! ~Luis

  • George Emsden 4 years ago

    Dear Nancy
    Love your videos which actually help me understand what is going on rather than just doing it parrot fashion. Regarding weirder logs, you mentioned natural logarithms but how about a video on Napierian logarithms?
    You might wish to mention Napier’s Bones in passing

    Lastly, fascinated by the writing back to front? A video trick or do you do mirror writing 🙂
    Thanks again

  • Report for Clickbait 4 years ago

    i cant focus , how i can learn when all time im blushing hearing and seeing u teaching

  • Tehmeer Ali Paryani 4 years ago

    Very good to see you back! Are you single?

  • Don M Jr. 4 years ago

    Nacy! You make my math life easier! Lol.

  • Arsalan Hassan 4 years ago

    Hi Nancy…how are you???

  • Loren Moore 4 years ago

    I love your. Channel. I am glad you are still here.

  • Jai670 Padhi 4 years ago

    Thank you too Nancy. Keep your videos coming; they are good, simple & lucid. Best of luck dear.

  • Bryan 4 years ago

    love you channel, i wonder if you can teach vectors, its really foreign territory to me, thanks

  • WeirdozChannel 4 years ago

    please have my babies

  • charrr 4 years ago

    Hi! Just wondering though. Why did you create a new youtube channel?

  • Amoon RA 4 years ago


  • Regulus Healing 4 years ago

    Can you help me with the QAnon Clock?

  • Sultan mahmud 4 years ago

    How can anyone learn anything from from you;everytime i watch your videos and half the time i spend watching you?
    You should wear a hijab so that people don’t get distracted

  • CIRUS MEDIA 4 years ago

    Why start over? ….you had close to .5m subscribers on your last channel, at least you would be getting some kind of compensation for all the time you put into these videos.

  • wasit ali 4 years ago

    Good to c u too

  • Thorn Belasarius 4 years ago

    please Nancy…we do mathematicS…not mathematic….math? :-/

  • ashish pawar 4 years ago

    Very nice channel!!
    Why don’t you teach us higher mathematical concepts in your way ??
    Like Laplace transforms and differtial equestions #mathbff

  • Your Choice 4 years ago

    Yeah… So.. when are we getting married? 😂🙃

  • John Russell Freyra 4 years ago

    i am willing to marry math with you by my side

  • LEAF A Job Shop in N.W. Indiana 4 years ago

    Happy your back….. subscribed and liked.

  • Alex Langenstein 4 years ago


  • Cups Edits 4 years ago

    I searched for you so hard!

  • Joris Geurts 4 years ago

    Nancy, on your old channel, you had some video’s which are missing here. Could you please add them?
    It’s about: “How to Remember the Unit Circle” and “Derivatives… What?”.

  • RoxyQueen 4 years ago

    Do you have a website? are you tutoring also?

  • Megha S. 4 years ago

    Finally found u… Thank God…

  • Axel Moreno 4 years ago

    Hey Nancy, I have to say that your video on calculus are really helping me and also using khan academy. Do you think that you could talk about finding the derivative in table charts

  • Muhammad Tayyab 4 years ago

    what was your old channel

  • Karley Spriggs 4 years ago

    Please post more!! You explain everything so well!! 😊😃

  • Mayankraj Prajapat 4 years ago

    I searched you again on math buff but …..I found you here at last …..Very happy to find you.

  • Chanaka Jayetileke 4 years ago

    welcome Back…!!!

  • Glenn Parham 4 years ago

    My name is Glenn Perhaps. You are a great mathematician . I have a theory concerning faster than light speed, I understand the concept of faster than light, but I need a better understanding of a more advanced math, it’s hard to discover. Your trig helps, but I need a more advanced versions. Moving on, I know the secret of you writing backward. You write with both hand. You prefer writing with your left hand because of the clear board in front of you. In front of you is a clear glass board. Therefore, you are writing from right to left.

  • Ken Shamrock 4 years ago

    She is back!!! Time to enroll in another math class.

  • Hh Mm 4 years ago

    Damn I think if all women as nice as you we would be in trouble . Keep up the good work.

  • Hh Mm 4 years ago

    No wander that song is about am in love with a teacher.. they probably meant it for Nancy.

  • stevem79 Weprith 4 years ago

    It’s really great how you explain the math, I used to hate math growing up in school, but as an adult now I really like it, thank you for making it easier for me to like math even more!

  • Tim Rubin Halcomb 4 years ago

    I think you do an excellent job with your instruction videos.
    Are you a teacher, or are you just doing it for fun?

  • Aiman Alzubairi 4 years ago

    Hi Nancy,
    Welcome back. I’ve to say you make math so easy like drinking a glass of water. You’re & will be the best teacher in math.

  • Johan Esbach 4 years ago

    Nancy, you asked for some ideas. You should connect this channel to your FB page, that way FB could direct traffic to Youtube. Sounds a lot like the chain, Calculus !!!

  • Prince Primus 4 years ago

    Your candle will go out long before your legend ever will

  • 小野義則 4 years ago

    you re so so pretty!!! from japan

  • Steve Lessard 4 years ago

    Hey Nancy, there is 1 dead give-away in some of your videos that shows how you write backwards. I would be happy to share my observation with you in a private email. But I do have to say kudos to you for pulling this off 🙂

  • Tyler MacDonald 3 years ago

    Can you please make a video looking at how different fractions involving variables are turned into exponents? No one taught me this and it’s making calculus very difficult.

  • Giannis Michalakopoulos 3 years ago

    Με αφορμή την εναλλαγή λογαριασμών στο YouTube κερνάω ποτό

  • Mariano 3 years ago

    She Still Around Doing Math Videos, Well I Graduated After Flunking Pre-Calc Twice. I’m Going Back, Cause I Got Years Of Practice Now.

  • Meerhussain Baloch 3 years ago

    I love you

  • Zulu Oneten 3 years ago

    MathBFF could have been mistaken as mathBoyFemaleFemale…

  • Andrea Buscio 3 years ago

    Your explanations are phenomenal!
    Thank YOU!!!

  • Twotoes Thecurmudgeon 3 years ago

    Can you do some partial derivative vids? maybe throw in there how to deal with constants in general and how to deal with them in the numerator and denominator. I’m having a hard time knowing when to 0 and when to use the quotient rule. Thanks for your time and effort.

  • Saurabh Kumar 3 years ago

    You are looking so pretty. 😘😘😘😘

  • Joelma Canon Ricco 3 years ago

    Te amo

  • black current 3 years ago

    Teach us Euler’s , Fourier series transform and inverse Fourier and z transform and so on plz

  • Chester Carbungco 3 years ago

    where’s the old channel?

  • Rahul G 3 years ago

    I can’t stop looking at her face. She’s gorgeous!

  • Ghost572 3 years ago

    I thought you’d deleted your old videos and was annoyed because you had a good video on trig / cosine and sines etc. Lucky me I found them.

  • Paul Thomassen 3 years ago

    I really wished you did some physics videos too. You’ve really helped me with math.

  • Kurei Wekmara 3 years ago

    Can you post implicit derivatives please,
    You the best ever 👍👍👍👍👍👍

  • Maren Grau 3 years ago

    you remind me of Christy Carlson Romano. sorry that is completely random but hey, I love your channel and you are the reason I have nearly made it through my engineering degree. please keep making videos!

  • Ather Radwi 3 years ago

    Thank you very much for your inspiration and motivation!
    Although, I never liked math until grade 12, and although most of what you explain to the geniuses out here , just flies over my head! Nonetheless, some how it’s so insightful and enlightening.☺️

  • ريان عبدالله العتيبي 3 years ago

    I learned too many things from your videos keep going you are great at explaining mathematics

  • Twobarpsi 3 years ago

    Where were you when I was in school?! My math teachers sucked!!

  • Uver Santa Cruz 2 years ago

    Hi Nancy, are you still making videos? Could use a proof of Pascal’s rule.

  • Sohail Javed abbasi 2 years ago

    You looks hot Nancy …wow your brain full of math..

  • Mohd Hafidzul 2 years ago

    Hai Nancy, can u share how to make video light board like you did

  • Nikhil Pant 2 years ago

    I love you

  • Peter Goodwill 2 years ago

    hello nancyPI from South Africa

  • Fredy Guevara 2 years ago

    Thank you very very kindly for all your help, I need all the help I can get with calculus, struggling with calculus

Comments are closed.