My desk of Integrals has the overall scenario ##int frac dx x^2+a^2 ## as being a 'normal' integral also, not only the case exactly where ##a=one##. But I do think this staying a Calculus research dilemma it is expected of your OP to figure out how to make it happen. https://gabletoppak.com/the-benefits-of-switching-to-sustainable-milk-cartons-today/