My table of Integrals has the general scenario ##int frac dx x^two+a^two ## as a 'normal' integral far too, not only the case where by ##a=one##. But I think this becoming a Calculus homework difficulty it is anticipated of the OP to figure out how to get it done. Hints https://gabletoppak.com/gabletop-pak-the-ideal-packaging-solution-for-dairy-products/