My desk of Integrals has the overall situation ##int frac dx x^2+a^two ## like a 'conventional' integral also, not only the situation the place ##a=1##. But I believe this remaining a Calculus research issue it is predicted from the OP to figure out how to get it done. Hints were https://gabletoppak.com/travel-green-gabletop-paks-sustainable-shift/