Question

Evaluate `intx^3/(1+x^5)?`

Answer 1

Note that : http://www.wolframalpha.com/input/?i=integral+of+x%5E3%2F%281%2Bx%5E5%29

You can use a program to factor the denominator and then use partial fraction to get the integral... but i don't think using trigonometric substitution is the right thing to do here.