\[\wp\left(z\right)=-\frac{\eta_{1}}{\omega_{1}}+\frac{\pi^{2}}{4\omega_{1}^{2}}%
\sum_{n=-\infty}^{\infty}{\csc}^{2}\left(\frac{\pi(z+2n\omega_{3})}{2\omega_{1%
}}\right),\]