My Table of Integrals has the general circumstance ##int frac dx x^two+a^2 ## as being a 'regular' integral as well, not just the situation wherever ##a=1##. But I think this being a Calculus research challenge it is anticipated from the OP to figure out how to make it happen. Hints https://gabletoppak.com/gabletop-pak-leading-the-way-as-milk-carton-manufacturers-in-india/