Immediately after locating the constants A and B it's somewhat straightforward to compute the integral ##int frac dx x^two + 9 ## as it could possibly now be composed as two more simple integrals. I tried but I simply cannot see how ##A,B## are constants? In contrast to your RSC, https://gabletoppak.com/sustainable-liquid-soap-packaging-why-gabletop-cartons-are-the-eco-friendly-choice/