My table of Integrals has the general situation ##int frac dx x^two+a^2 ## to be a 'conventional' integral much too, not merely the situation wherever ##a=one##. But I feel this staying a Calculus homework trouble it is predicted of the OP to figure out how to do it. Hints were https://gabletoppak.com/why-every-home-should-use-long-lasting-oil-storage-cartons-for-daily-cooking/