1. The problem statement, all variables and given/known data arctan(x)/(1+x2). finding the antiderivative 2. Relevant equations arctanx=1/1+x^2 3. The attempt at a solution I tried pulling out arctan(x) S 1/(1+x^2) dx --> arctan^2(x)+c but the answer also has a 1/2 in front of the arctan...where'd that come from?