12:45

can you solve this exponential equation?

19:14

The strange cousin of the complex numbers -- the dual numbers.

18:26

your Calculus teacher lied* to you

20:37

Integrate x^-x dx

12:23

Gauss's Arithmetic-Geometric mean

18:46

A questionable factorial problem

17:39

the integral that Feynman('s trick) couldn't solve

17:18

towards the notion of an exact second order differential equation