My desk of Integrals has the overall case ##int frac dx x^2+a^two ## to be a 'standard' integral way too, not merely the case the place ##a=one##. But I think this currently being a Calculus research problem it is expected from the OP to figure out how to get it https://gabletoppak.com/glass-bottles-for-beer-soda-and-even-water-found-to-contain-toxic-levels-of-cancer-linked-microplastics-than-plastic-bottles-study-says/