Solving congruences, 3 introductory examples

How Cauchy would find the maximum of sqrt(x)+sqrt(y)

how is i^x=2 possible?

exact value of sin(10 degrees)

proving the limit of a product is the product of the limits, epsilon-delta definition

How to prove the cubic formula (from scratch)

calculus teacher vs "I know it already" student

if your calculus teacher still doesn't believe the DI method...

i-th root of -1

100 integrals part 2 (this is passion!)

when your calculus test has only one problem

an evil differential equation quiz

how Laplace solved the Gaussian integral

100 Inevitable Algebra Problems for Calculus

how Richard Feynman would integrate 1/(1+x^2)^2

so you want a HARD integral from the Berkeley Math Tournament

3 factoring tricks that you probably didn’t know

de Moivre quintic formula

solving tan(1/x)=1/tan(x)

100 calculus limits (ft epsilon-delta definition and Riemann sum limits )

Solving the last question on a math league contest

arguing with a math PhD friend be like (unscripted, unedited)

solution to the logarithmic triangle

baby calculus vs adult calculus

(1+2+3)^2=1^3+2^3+3^3