My table of Integrals has the final situation ##int frac dx x^2+a^2 ## being a 'common' integral much too, not simply the situation where by ##a=one##. But I feel this currently being a Calculus research issue it is anticipated on the OP to figure out how to make it happen. https://gabletoppak.com/customized-packaged-drinking-water-with-your-brand-logo/