My Desk of Integrals has the overall scenario ##int frac dx x^2+a^2 ## as a 'standard' integral too, not just the situation wherever ##a=1##. But I believe this becoming a Calculus homework trouble it is predicted with the OP to figure out how to do it. Hints got earlier mentioned. https://gabletoppak.com/is-bottled-water-a-healthy-choice/