latex - Trying to split an equation, but it will not compile -

i trying split equation because long line. here equation:

\begin{equation} \label{eq:eq37} \begin{split} y(x) = p \left[ \sum_{n=0}^{\infty} \frac{\left(i \omega b \left( x_c - x \right) \right)^{n}}{n!(n+b-1)!}+h(0.5-\textup{re}(b) ) \frac{\sin{\theta_e}}{\sin{\left( \theta_e - \pi b \right)}} \\  \times \frac{b(-b)!}{(b+1)!} \omega^{2} e^{1+b} \left(x_c - x \right)^{1-b} \sum_{n=0}^{\infty} \frac{\left( \omega b \left(x_c - x \right) \right)^{n}}{n!(n+1-b)!} \right], \end{split} \end{equation}  

the message when compiling is:

! }, or forgotten \right. <template> }             $\endtemplate  l.579 \end{split} 

\left , \right should on same line:

\begin{equation}     \begin{split}     \left( blah blah \right. \\     \left. blah blah \right)     \end{split} \end{equation} 

for equation, try this:

\begin{equation} \label{eq:eq37} \begin{split} y(x) = p \left[ \sum_{n=0}^{\infty} \frac{\left(i \omega b \left( x_c - x \right) \right)^{n}}{n!(n+b-1)!}+h(0.5-\textup{re}(b) ) \frac{\sin{\theta_e}}{\sin{\left( \theta_e - \pi b \right)}} \right. \\  \left. \times \frac{b(-b)!}{(b+1)!} \omega^{2} e^{1+b} \left(x_c - x \right)^{1-b} \sum_{n=0}^{\infty} \frac{\left( \omega b \left(x_c - x \right) \right)^{n}}{n!(n+1-b)!} \right] \end{split} \end{equation}