My table of Integrals has the general situation ##int frac dx x^2+a^2 ## as being a 'normal' integral way too, not simply the case the place ##a=1##. But I believe this currently being a Calculus homework dilemma it is anticipated in the OP to figure out how to do it. https://gabletoppak.com/lakes-developed-under-smart-cities-initiative-in-coimbatore-turn-dumping-grounds-for-plastic-waste/