integral of x^2/(xsin(x)+cos(x))^2
14:42
Using Feynman's technique TWICE! (the integral of sin^3(x)/x^3 from 0 to inf)
20:37
Integrate x^-x dx
10:21
Integral of (x^2+20)/(x*sin(x)+5cos(x))^2
17:53
Supreme Integral with Feynman's Trick
18:08
a super nice functional equation
5:23
life changing integration by parts trick
10:11
Innocent looking, but ????
17:42