My table of Integrals has the general case ##int frac dx x^2+a^two ## as being a 'common' integral too, not simply the situation where ##a=1##. But I do think this currently being a Calculus research dilemma it is expected on 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/