Hello.

= x^3/(x^2+2x+1)

The easiest way to solve this is using long polynomial division, it leads to

= - 1/(x+1)^2 + 3/(x+1) + x - 2

you should be able to solve that.

First of all, do you know long polynomial division? If not, you could use partial fraction expansion instead.

Cheers

Rapha