A nasty looking trigonometric integral
16:57
A very interesting log trig integral
22:59
A deceivingly difficult integral
14:34
The trig integral of your dreams (or nightmares)
15:24
Romanian Mathematics Olympiad
17:00
An Insane Integral — Feynman's Technique
13:43
A ridiculously awesome integral with an epic result
33:01
The Man Who Almost Broke Math (And Himself...)
3:48:47