Diagram Latex

$\sqrt{3x-1}+(1+x)^2$

$$
\begin{aligned}
\nabla \cdot \vec{E} &= \frac{\rho}{\varepsilon_0} \\
\nabla \cdot \vec{B} &= 0
\end{aligned}
$$

$$ {1|3|all}
\begin{aligned}
\nabla \cdot \vec{E} &= \frac{\rho}{\varepsilon_0} \\
\nabla \cdot \vec{B} &= 0 \\
\nabla \times \vec{E} &= -\frac{\partial\vec{B}}{\partial t}
\end{aligned}
$$

import 'katex/contrib/mhchem'

export default {}

$$
\ce{B(OH)3 + H2O <--> B(OH)4^- + H+}
$$