My Table of Integrals has the final situation ##int frac dx x^two+a^two ## for a 'conventional' integral as well, not just the situation wherever ##a=1##. But I do think this getting a Calculus homework difficulty it is expected from the OP to figure out how to do it. Hints were https://gabletoppak.com/boost-your-brand-with-premium-white-label-water-bottles/