My table of Integrals has the final situation ##int frac dx x^2+a^two ## for a 'normal' integral too, not just the situation exactly where ##a=one##. But I believe this remaining a Calculus research dilemma it is expected with the OP to figure out how to make it happen. Hints were https://gabletoppak.com/how-gabletop-cartons-are-helping-water-brands-combat-climate-change/