Just after obtaining the constants A and B it's reasonably easy to compute the integral ##int frac dx x^two + nine ## as it could now be created as two simpler integrals. I attempted but I can not see how ##A,B## are constants? The post traces the background of packaging https://gabletoppak.com/elevate-your-brand-with-gable-top-paks-white-label-water-packaging/