My table of Integrals has the overall scenario ##int frac dx x^two+a^two ## as being a 'standard' integral far too, not just the situation in which ##a=1##. But I feel this currently being a Calculus homework difficulty it is predicted from the OP to figure out how to make it https://gabletoppak.com/kerala-get-ready-to-say-no-to-plastic-from-october-2/