∫x^5/(x^6 + 5)^4dx?

Answer 1

Let u=x^6 + 5, then du = 6x^5 dx, so we have:

1/6 ∫1/u^4 du
-1/(18u³) + C
-1/(18(x^6 + 5)³) + C

And we are done

Answer 2

That's easy. Don't ask for help with such simple equations, just use the Windows calculator.