solving equations but they get increasingly awesome
9:21
integral of 1/(x^2+1) but you didn't learn it this way in calculus 2
13:51
so you want a VERY HARD math question?!
31:27
EXTREME quintic equation! (very tiring)
8:38
You use the quadratic formula all the time, but where did it come from?
14:47
An Exact Formula for the Primes: Willans' Formula
11:25
solving equations but they get increasingly more impossible?
24:50
5 Levels Of “No Answer" (when should we use what?)
20:01