Integrate [sin( x)/ (sin x + cos(x))]
11:00
Weierstrass Substitution
15:00
integrate sqrt(x+1) over sqrt(x+2)
26:51
Feynman's (almost) impossible integral
13:44
Integrate (sin^k( x) /(sin^k x + cos^k(x)] from 0 to half-pi
18:08
a super nice functional equation
11:16
Integral of nested radicals
16:54
An integral with a classic result
20:37