My desk of Integrals has the general scenario ##int frac dx x^two+a^2 ## as being a 'standard' integral way too, not only the situation where by ##a=1##. But I think this staying a Calculus homework difficulty it is anticipated in the OP to determine how to do it. Hints got https://gabletoppak.com/beyond-beverages-gable-top-cartons-the-versatile-customized-packaging-solution/