My desk of Integrals has the overall circumstance ##int frac dx x^two+a^two ## being a 'conventional' integral far too, not simply the case where ##a=1##. But I do think this getting a Calculus research problem it is anticipated of the OP to determine how to do it. Hints were given https://gabletoppak.com/why-paper-water-bottles-are-gaining-popularity-in-kerala/