After locating the constants A and B It is rather very simple to compute the integral ##int frac dx x^two + 9 ## as it could possibly now be penned as two easier integrals. I attempted but I can not see how ##A,B## are constants? , or flat. From your https://gabletoppak.com/reducing-microplastics-why-gable-top-cartons-are-better-than-plastic-water-bottles/