My Table of Integrals has the overall scenario ##int frac dx x^two+a^2 ## like a 'common' integral way too, not simply the case exactly where ##a=1##. But I do think this remaining a Calculus research challenge it is anticipated in the OP to figure out how to make it happen. https://gabletoppak.com/gabletop-pak-the-ideal-packaging-solution-for-dairy-products/