My Desk of Integrals has the overall situation ##int frac dx x^2+a^two ## for a 'typical' integral too, not simply the case wherever ##a=1##. But I feel this getting a Calculus research difficulty it is expected on the OP to figure out how to get it done. Hints got previously https://gabletoppak.com/supporting-sdg-14-life-below-water-through-sustainable-edible-oil-packaging-with-gabletop-cartons/