created: 2000-01-01T00:00:00+08:00
tags: [hello, math]
This is a beautiful math test.
## inline style
Einstein produced $`E = mc^2`$ from his special relativity equations.
## display style
The quadratic formula for the roots of the general quadratic equation:
```math
x = \frac{-b \pm \sqrt{b^2 - 4ac}}{ 2a }
```
matrices:
```math
\begin{bmatrix}
a_{11} & a_{12} & a_{13} \\
a_{21} & a_{22} & a_{23} \\
a_{31} & a_{32} & a_{33} \\
\end{bmatrix}
\begin{bmatrix}
x_1 \\
x_2 \\
x_3 \\
\end{bmatrix}
=
\begin{bmatrix}
b_1 \\
b_2 \\
b_3 \\
\end{bmatrix}
```