My table of Integrals has the final circumstance ##int frac dx x^2+a^two ## being a 'typical' integral as well, not simply the situation the place ##a=1##. But I believe this currently being a Calculus homework difficulty it is expected of your OP to figure out how to do it. Hints https://gabletoppak.com/sustainable-liquid-soap-packaging-why-gabletop-cartons-are-the-eco-friendly-choice/