My desk of Integrals has the general circumstance ##int frac dx x^two+a^2 ## for a 'common' integral as well, not merely the case exactly where ##a=one##. But I believe this remaining a Calculus homework issue it is predicted in the OP to determine how to get it done. Hints were https://gabletoppak.com/how-white-labeling-water-bottles-can-elevate-your-brand-identity/