find the integral: integral (4/(x^2+4))2 Ill use S for my integral So what i did so far is move the 4^2 out of the integral and get this: 16 S 1/(x^2+4)^2 I tried using partial fractions but got nothing. im not sure what to do. So far all I have learned was U sub, integral by parts, partial fractions, and trig substitution. Would trig substitution work? if i make x=2tan (theta) or is there another method i haven't seen yet.