My Table of Integrals has the general scenario ##int frac dx x^two+a^2 ## as being a 'typical' integral far too, not just the situation where ##a=1##. But I do think this being a Calculus homework trouble it is anticipated on the OP to determine how to get it done. Hints https://gabletoppak.com/glass-bottles-for-beer-soda-and-even-water-found-to-contain-toxic-levels-of-cancer-linked-microplastics-than-plastic-bottles-study-says/