After locating the constants A and B It can be rather easy to compute the integral ##int frac dx x^two + nine ## as it can now be composed as two less complicated integrals. I attempted but I can't see how ##A,B## are constants? The scale of the box may https://gabletoppak.com/glass-bottles-for-beer-soda-and-even-water-found-to-contain-toxic-levels-of-cancer-linked-microplastics-than-plastic-bottles-study-says/