$\displaystyle \int^a_\infty \frac{dz}{(1+z)^2(\Omega_0z+1)^{\frac12}}$
It is quite straightforward when $\displaystyle \Omega=1$ but I am strugling when $\displaystyle \Omega>1$.
Can I split this into partial fractions somehow? Or perhaps use integration by parts twice? Neither options seem to work for me.