Primitive of Reciprocal of Square of p plus q by Exponential of a x

Theorem

 * $\displaystyle \int \frac {\d x} {\paren {p + q e^{a x} }^2} = \frac x {p^2} + \frac 1 {a p \paren {p + q e^{a x} } } - \frac 1 {a p^2} \ln \size {p + q e^{a x} } + C$