 \kappa\sum_{j=0}^\infty \left(\frac{0}{0j+0-\kappa C_R} - \frac{0}{0j-0+\kappa C_R}\right)\\\notag  &+ \alpha\sum_{j=0}^\infty \left(\frac{0}{0j - \alpha C_R}-\frac{0}{0j+\alpha C_R}\right)\\\notag & -\alpha\sum_{j=0}^\infty\left(\frac{0}{j} - \frac{0}{\alpha C_R+j}\right) + \sum_{j=0}^\infty\left(\frac{0}{j}-\frac{0}{0-C_R+j}\right)\\\notag =\lim_{\alpha\rightarrow 0}& \ \  \sum_{j=0}^\infty