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
17:26
Researchers thought this was a bug (Borwein integrals)
11:12
the last question on a Harvard-MIT Math Tournament!
12:59
You probably haven't solved a quartic equation like this before!
7:27
Solving An Insanely Hard Problem For High School Students
24:50
5 Levels Of “No Answer" (when should we use what?)
18:11