Power rule for derivative, ex2 (don't use quotient rule here)

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)

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

i-th root of -1

100 integrals part 2 (this is passion!)

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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