My Table of Integrals has the general situation ##int frac dx x^2+a^2 ## for a 'conventional' integral far too, not only the case the place ##a=one##. But I do think this staying a Calculus homework trouble it is predicted of your OP to figure out how to get it done. https://gabletoppak.com/how-white-labeling-water-bottles-can-elevate-your-brand-identity/