My table of Integrals has the final scenario ##int frac dx x^2+a^two ## being a 'normal' integral as well, not simply the case in which ##a=one##. But I feel this remaining a Calculus research challenge it is predicted on the OP to determine how to do it. Hints got higher https://gabletoppak.com/customized-mineral-water-bottles-and-packaged-drinking-water-the-future-of-sustainable-packaging-at-gabletop-pak/