My table of Integrals has the overall circumstance ##int frac dx x^2+a^two ## being a 'standard' integral much too, not simply the case exactly where ##a=1##. But I believe this currently being a Calculus homework issue it is predicted in the OP to determine how to make it happen. Hints https://gabletoppak.com/gabletop-pak-leading-the-way-as-milk-carton-manufacturers-in-india/