My Table of Integrals has the general case ##int frac dx x^two+a^two ## like a 'normal' integral as well, not just the situation the place ##a=1##. But I think this being a Calculus research dilemma it is expected of the OP to determine how to get it done. Hints were https://gabletoppak.com/quenching-thirst-building-brands-how-free-water-campaigns-on-gable-top-cartons-create-impactful-brand-awareness/