Simple differential equation

1. The problem statement, all variables and given/known data

Solve the differential equation




2. Relevant equations


3. The attempt at a solution




I just can't integrate that (1+y)^(1/2)/(1+y^2)dy at the end... the other two integrals are trivial.

 

I actually tried before posting. Once you make the substitution there are two ways to attempt the problem, one by doing u^2 = 1+y and then differentiating, and the other got me to 2*(1+y)^(1/2)du = dy. None of these seemed to make the integral any easier.