Use the rules of exponents to rewrite as
Yep. I was being lazy and careless.
so how should I go about solving this problem?
Do exactly what galactus said but be careful like mr fantastic said!
is an even function so you really only need to integrate for x> 1, where galactus' method has no problem, and then use the same integral for x< -1.
Or you can go with integration by parts
so we have
correct me anyone if I did anything wrong.