My desk of Integrals has the overall case ##int frac dx x^two+a^two ## to be a 'conventional' integral far too, not only the situation in which ##a=one##. But I feel this becoming a Calculus research difficulty it is expected with the OP to figure out how to make it happen. https://gabletoppak.com/boost-brand-visibility-with-customized-packaged-drinking-water/