My Table of Integrals has the overall scenario ##int frac dx x^two+a^2 ## as a 'regular' integral as well, not simply the situation where by ##a=one##. But I believe this getting a Calculus homework difficulty it is expected of the OP to determine how to get it done. Hints were https://gabletoppak.com/eco-friendly-packaging-solutions-for-dairy-products-in-india/