My table of Integrals has the overall circumstance ##int frac dx x^two+a^2 ## as being a 'common' integral much too, not just the case in which ##a=one##. But I believe this currently being a Calculus homework problem it is predicted with the OP to figure out how to do it. https://gabletoppak.com/how-telanganas-amrabad-tiger-reserve-fights-back-against-its-biggest-threat-plastic/