My table of Integrals has the final circumstance ##int frac dx x^two+a^two ## like a 'normal' integral also, not just the situation wherever ##a=1##. But I think this becoming a Calculus research challenge it is anticipated from the OP to determine how to get it done. Hints were given over. https://gabletoppak.com/how-white-labelled-water-elevated-business-image/