I am trying to format this equation so that it fits in a two-column format with brackets. It's too long at this point and spreads to two columns at this point...
Here is the original code...
\begin{multline}
\label{encusts}
N_{n}(T) = \sum_{x=0}^{\infty} [1 - F(x)^n] \\
\quad \quad = \sum_{x=0}^{\infty}\left[1-\left(1-x! \binom{2 x}{x} \rho ^x (\rho +1)^{-2 x-1}_2\tilde{F}_1\left(1,x+\frac{1}{2};x+2;\frac{4 \rho }{(\rho +1)^2}\right)\right)^n].
\end{multline}
Here is the code that I can't compile. I'm trying to use \right. and \left. to make sure the brackets on the second line with the summation can match the bracket on the third line...
\begin{multline}
\label{encusts}
N_{n}(T) = \sum_{x=0}^{\infty} [1 - F(x)^n] \\
\quad \quad = \sum_{x=0}^{\infty}\left[1-\left(1-x! \binom{2 x}{x} \rho ^x (\rho +1)^{-2x-1} \right. \\
\left. \, _2\tilde{F}_1\left(1,x+\frac{1}{2};x+2;\frac{4 \rho }{(\rho +1)^2}\right)\right)^n \right].
\end{multline}
Thanks for the help...