so you want a VERY HARD math question?!
7:06
Can 1^x=2?
22:28
so you want a HARD integral from the Berkeley Math Tournament
11:12
the last question on a Harvard-MIT Math Tournament!
9:21
Be careful with this nested square root equation
7:27
Solving An Insanely Hard Problem For High School Students
18:25
L'épreuve de mathématique la plus terrifiante (ENS 1966)
9:49
Solving x^5=1
24:48