My table of Integrals has the final circumstance ##int frac dx x^two+a^2 ## as being a 'standard' integral too, not merely the situation the place ##a=1##. But I think this currently being a Calculus research trouble it is expected from the OP to figure out how to get it done. https://gabletoppak.com/how-telanganas-amrabad-tiger-reserve-fights-back-against-its-biggest-threat-plastic/