My table of Integrals has the general situation ##int frac dx x^2+a^two ## to be a 'common' integral far too, not simply the case where ##a=1##. But I think this becoming a Calculus research difficulty it is predicted of the OP to determine how to make it happen. Hints were https://gabletoppak.com/sustainability-in-action-gable-top-cartons-to-save-our-oceans/