My desk of Integrals has the overall case ##int frac dx x^two+a^2 ## to be a 'typical' integral way too, not just the situation exactly where ##a=one##. But I believe this remaining a Calculus homework issue it is anticipated in the OP to figure out how to make it happen. https://gabletoppak.com/lakes-developed-under-smart-cities-initiative-in-coimbatore-turn-dumping-grounds-for-plastic-waste/