My desk of Integrals has the general situation ##int frac dx x^two+a^two ## as a 'typical' integral too, not just the case in which ##a=1##. But I believe this being a Calculus research challenge it is expected in the OP to figure out how to do it. Hints were given https://gabletoppak.com/hc-issues-notice-over-plea-to-make-dwarka-plastic-free/