My desk of Integrals has the general scenario ##int frac dx x^two+a^2 ## like a 'typical' integral far too, not simply the situation where by ##a=one##. But I feel this becoming a Calculus research issue it is expected on the OP to figure out how to get it done. Hints https://gabletoppak.com/elevate-your-brand-with-gable-top-paks-white-label-water-packaging/