My table of Integrals has the overall circumstance ##int frac dx x^two+a^2 ## as being a 'conventional' integral also, not only the case wherever ##a=1##. But I think this becoming a Calculus research trouble it is expected with the OP to determine how to do it. Hints got earlier mentioned. https://gabletoppak.com/from-plastic-bottles-to-gabletop-cartons-a-step-toward-solving-the-plastic-pollution-crisis/