🚀 go-pugleaf

I have the following equation that don't fin in one line

\begin{eqnarray}
\partial_{k} \xi^{s} \left(u_{p} \tau_{kp} - q_{k} \right) & = &
 {{M_{\inf} \mu} \over {R_{e}}} \\ 
& & \left[ \left( \partial_{k}  \xi^{s} \partial_{p} \xi^{n}
- {{2}\over{3}}  \partial_{p} \xi^{s} \partial_{k} \xi^{n}\right) u_{p}
{{\partial u_{k}}\over{\partial \xi^{n}}} + \partial_{k} \xi^{s} \partial_{k}
\xi^{n} u_ {p} {{\partial u_{p}} \over {\partial \xi^{s}}} +
{{1}\over{(\gamma-1)P_{r}}} \partial_{k} \xi^{s} 
{{\partial \left(a^{2} \right)} \over {\partial \xi^{n}}} \right];  p=1-3
\end{eqnarray}

This is the only way through which I could put the equation in two
lines. LaTex wouln't let me cut the equation inside the paranthesis.
Is there any way to do that.

Thanks

Hazem