1. The problem statement, all variables and given/known data ∫1/(x2+4)2 2. Relevant equations ∫dx/(x2+a2)=(1/a)arctan(x/a)+c 3. The attempt at a solution This looks like an arctan integral or a trig substitution, but in its current form neither would work without manipulation. I'm mainly looking for how to manipulate it to use one of these methods Thanks!