Non-linear differential equations have strange solutions!
15:29
a beautiful differential equation
13:06
One crazy looking integral
9:00
A cool non linear differential equation
18:44
A deceivingly difficult differential equation.
22:27
Bernoulli Numbers, Cotangent, and Tangent
10:13
An awesome system of two non-linear differential equations
21:25
one of the most beautiful techniques
11:56