21:35

1961 IMO #1

19:08

A beautiful integral for the mind

18:01

Deriving the Gamma Function

7:52

Integral of ln(x) with Feynman's trick!

22:42

Kepler’s Impossible Equation

13:51

Square-root of a matrix

21:39

a * b = ab + a + b

24:48

Can you solve this Cambridge Entrance Exam Question?