Please am stuck with the integration I kindly need assistance in solving this equation, I will really appreciate if anyone could help with the solution or a guide on what i should do

$\displaystyle \int\limits_0^\infty {\log (1 + \frac{a}{b}x)\frac{{N{e^{ - x}}{x^{y - 1}}}}{{\left( {y - 1} \right)!}}} {\left( {1 - {e^{ - x}}\sum\limits_{i = 0}^{y - 1} {\frac{{{x^i}}}{{i!}}} } \right)^{N - 1}}dx$