My desk of Integrals has the final situation ##int frac dx x^2+a^2 ## for a 'conventional' integral too, not just the case exactly where ##a=1##. But I believe this getting a Calculus homework problem it is predicted on the OP to figure out how to make it happen. Hints got https://gabletoppak.com/boost-brand-visibility-with-customized-packaged-drinking-water/