My Desk of Integrals has the overall case ##int frac dx x^2+a^two ## for a 'normal' integral also, not only the situation exactly where ##a=1##. But I believe this remaining a Calculus homework challenge it is predicted on the OP to determine how to do it. Hints were given previously https://gabletoppak.com/is-it-legal-to-sell-natural-mineral-water-in-gabletop-cartons-tetra-paks-and-aluminium-cans-in-india/