A floor integral leading to a nice result: int (0,1) x\floor(1/x)
20:12
A surprisingly difficult integral: int 0 to π/2 arctan(2sin(x)) solution using Feynman's trick
14:56
A fascinating integral solved using Feynman's technique: int (0,infty) ln(x)/(1+cosh(x))
11:08
More complex than I imagined
15:11
AN OVERPOWERED SUBSTITUTION FOR INTEGRALS: int(0,1) ln(1-x^2)/(1+x^2)
7:16
Sum from 1 to infinity of 1/(k^2+1)
19:09
Um MONSTRO absoluto de uma integral
16:41
A very interesting integral: int (0,infty) (sin(x)cos(x))/(sinh(x)cosh(x))
13:45