My table of Integrals has the general case ##int frac dx x^two+a^2 ## being a 'common' integral way too, not just the situation where by ##a=one##. But I do think this being a Calculus research challenge it is anticipated of the OP to determine how to get it done. Hints https://gabletoppak.com/eco-friendly-packaging-solutions-for-dairy-products-in-india/