Soon after getting the constants A and B It is rather easy to compute the integral ##int frac dx x^2 + 9 ## as it might now be published as two simpler integrals. I attempted but I can't see how ##A,B## are constants? A carton is often described for a https://gabletoppak.com/choosing-between-gable-top-packaging-and-plastic-bottles-for-your-beverage-business/