$\begin{bmatrix}a & b\e^{\pi} & \frac{\rho}{\epsilon_{0}}\end{bmatrix}$
$$ LaTeX \mu_0 \frac{12}{13} \sqrt{2}+\sqrt{3} \left[\begin{matrix}a & b\e^{\pi} & \frac{ρ}{ε_{0}}\end{matrix}\right]
\begin{bmatrix}a & b\e^{\pi} & \frac{\rho}{\epsilon_{0}}\end{bmatrix} $$
LaTeX\\
\begin{equation}\mu_0\end{equation}
\begin{equation}\frac{12}{13}\end{equation}
\begin{equation}\sqrt{2}+\sqrt{3}\end{equation}
\begin{equation}\left[\begin{matrix}a & b\\e^{\pi} & \frac{ρ}{ε_{0}}\end{matrix}\right]\end{equation}LaTeX\\
\mu_0\\
\frac{12}{13}\\
\sqrt{2}+\sqrt{3}\\
\begin{bmatrix} a & b \\ e^{\pi} & \frac{\rho}{\epsilon_{0}} \end{bmatrix}