My table of Integrals has the general case ##int frac dx x^2+a^two ## like a 'typical' integral much too, not only the case in which ##a=1##. But I believe this currently being a Calculus research trouble it is predicted of the OP to figure out how to do it. Hints https://gabletoppak.com/why-every-home-should-use-long-lasting-oil-storage-cartons-for-daily-cooking/