The first test case is to create a matrix consisting of following elements $$ \begin{matrix} 1 & x & x^2 \ 1 & y & y^2 \ 1 & z & z^2 \ \end{matrix} $$

but all elemments of the matrix are displayed in one line. Fortunately, this can be solved by wraping the math expression inside a `<div> </div>`

block, which is hinted by the hugo documents of
MathJax Support. besides, the blank line before `<div> </div>`

block is necessary, otherwise the matrix would not be displayed correctly.

Actually, what I would like to do is to display multi-line equations. Taking the example from the stackoverflow question [Mathjax multi-line equation rendering issue] ( http://stackoverflow.com/questions/18860693/mathjax-multi-line-equation-rendering-issue), I input following MathJax expressions.

```
$$
\begin{eqnarray}
y &=& x^4 + 4 \nonumber \\
&=& (x^2+2)^2 -4x^2 \nonumber \\
&\le&(x^2+2)^2 \nonumber
\end{eqnarray}
$$
```

$$ \begin{eqnarray} y &=& x^4 + 4 \nonumber \ &=& (x^2+2)^2 -4x^2 \nonumber \ &\le&(x^2+2)^2 \nonumber \end{eqnarray} $$

As you can see, the equations are displayed in one line. From the comments of the question, the solution is to use `\\\\\\`

instead of `\\`

as newline command, which also can be applied to the test example of matrix. But I think typing 6 `\`

is quite tedious. Is there any concise solution?

$$ \begin{eqnarray} y &=& x^4 + 4 \nonumber \\\ &=& (x^2+2)^2 -4x^2 \nonumber \\\ &\le&(x^2+2)^2 \nonumber \end{eqnarray} $$

Alternative way to display matrix correctly is to use `\\\\\\`

instead of `\\`

as newline command.
$$
\begin{matrix}
1 & x & x^2 \\\
1 & y & y^2 \\\
1 & z & z^2 \\\
\end{matrix}
$$