My desk of Integrals has the final circumstance ##int frac dx x^two+a^two ## for a 'conventional' integral much too, not merely the situation where by ##a=one##. But I feel this currently being a Calculus homework difficulty it is anticipated in the OP to figure out how to make it happen. https://gabletoppak.com/supporting-sdg-14-life-below-water-through-sustainable-edible-oil-packaging-with-gabletop-cartons/