12:34

Sum of first n cubes - Mathematical Induction

15:24

Romanian Mathematics Olympiad

27:12

Austrian Olympiad System of Equations

18:35

The Basel Problem

16:33

USA Math Olympiad question with @skdjfk

4:42

Solving Limits in Indeterminate Form 0/0

34:54

ABSURD GUESS THE ELO!!!!!

11:19

100% Accuracy at 12 Years Old. RIP Legend.