Just After locating the constants A and B it's rather simple to compute the integral ##int frac dx x^2 + 9 ## as it could possibly now be penned as two easier integrals. I tried but I cannot see how ##A,B## are constants? Photon 'time bins' and signal security display https://gabletoppak.com/aseptic-tetra-pak-vs-non-aseptic-gable-top-choosing-the-right-carton-for-your-needs/