My Desk of Integrals has the general scenario ##int frac dx x^2+a^two ## being a 'regular' integral too, not just the situation in which ##a=one##. But I feel this remaining a Calculus homework difficulty it is expected with the OP to determine how to get it done. Hints got earlier https://gabletoppak.com/why-gabletop-cartons-outshine-pet-bottles-for-branding-opportunities/