this mix makes integrals very difficult!
26:38
a very golden Fibonacci sum
23:43
a very tricky Diophantine equation
18:36
complex numbers tells us that the factorial is very special
17:13
A Magic Square Breakthrough - Numberphile
21:23
a nice result from Ramanujan's "lost notebook"
17:18
towards the notion of an exact second order differential equation
16:54
An integral with a classic result
28:33