My Table of Integrals has the overall scenario ##int frac dx x^two+a^two ## as a 'regular' integral way too, not simply the situation wherever ##a=1##. But I do think this getting a Calculus research dilemma it is expected on the OP to figure out how to make it happen. Hints https://gabletoppak.com/india-emerges-as-the-largest-plastic-polluter-globally/