9: You get
This is a rational function. You should start by decomposing the denominator, which is not easy and leads to quite ugly fractions:
This calculations could be finished, but perhaps you could do it better.
You can avoid the trouble if you notice that the integral can be evaluated by a simple substitution - just take the whole denominator.
Another alternative is to lower the powers in the integral by the
substitution
This is almost an elementary integral, apply integration by parts. After the back substitution you get the answer.