../
Math Mode test
$$
\begin{equation}
\left \{
\begin{aligned}
\nabla \times \vec{\mathbf{B}} - \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t} & = \frac{4\pi}{c}\vec{\mathbf{j}} \\\\
\nabla \cdot \vec{\mathbf{E}} & = 4 \pi \rho \\\\
\nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} & = \vec{\mathbf{0}} \\\\
\nabla \cdot \vec{\mathbf{B}} & = 0
\end{aligned}
\right.
\end{equation}
a^*
$$