\[\wp\left(z\right)+\frac{\eta_{1}}{\omega_{1}}-\frac{\pi^{2}}{4\omega_{1}^{2}}{%
\csc}^{2}\left(\frac{\pi z}{2\omega_{1}}\right)=-\frac{2\pi^{2}}{\omega_{1}^{2%
}}\sum_{n=1}^{\infty}\frac{nq^{2n}}{1-q^{2n}}\cos\left(\frac{n\pi z}{\omega_{1%
}}\right),\]