11:24

integrate sec^3x

20:37

Integrate x^-x dx

13:53

int[sin^4(x)]

14:40

Integrate(sqrt (5-4x-x^2 ))

19:41

integral of sqrt(tan(x)) by brute force

24:56

Integrate 1/(1+x^3)

15:01

how Laplace solved the Gaussian integral

10:49

Squeeze/Sandwich Theorem