Live markdown editor based on MathJax and Marked

Type something:

```
#include<cmath>
#include <stdio.h>
int main()
{
   // printf() displays the string inside quotation
   printf("Hello, World!");
   return 0;
}      
```
      
    ##### test
这个是行内数学公式$ \Gamma, G$ $A_G A_\Gamma$吗？

这个是独立数学公式$$\sum_{x=1}^m f(x)=1$$

> 注释注释注释，这个是行内数学公式$ \Gamma, G$ $A_G A_\Gamma$吗？这个是行内数学公式$ \Gamma, G$ $A_G A_\Gamma$吗？这个是行内数学公式$ \Gamma, G$ $A_G A_\Gamma$吗？
>> $\Gamma$ [Example](http://exmaple.com)

```squence
  a-->b
```

$
\begin{array}{|c|c|c|c|}
\hline
1& 1 > -1 & 1 & -1 \\ \hline
& 3 & 55 & 44\\ \hline
& 4 & 93 & 33\\ \hline
& 5 & 6 &  22\\ \hline
\end{array} $

Markdown | Less | Pretty
--- | --- | ---
*Still* | `renders` | **nicely**
1 | 2 | 3

包含编号的方程式$$
\begin{equation*}
   e^{\pi i} + 1 = 0
\end{equation*}

In equation \eqref{eq:sample}, we find the value of an
interesting integral:
$$
\begin{equation}
  \int_0^\infty \frac{x^3}{e^x-1}\,dx = \frac{\pi^4}{15}
  \label{eq:sample}
\end{equation}
$$

```
if (1 <b> a </b> 2)
```

$$ \left|\begin{array}{cc}
  a & b \\
  c & c
\end{array}\right|
$$

$$\overbrace{x+\cdots+x}
  ^{n\text{ times}}$$

$$|x| = 
\cases{
x  & \text{if } x\ge 0\cr
-x & \text{if } x\lt 0
}$$

Use $\LaTeX$ to type formulæ and markdown to format text.

这个应该不用显示数学公式 $ \begin{array}{cc} a & b \\ c & c \end{array} $

这个显示数学公式 $ \begin{array}{cc} a & b \\ c & c \end{array} + \fenshu{错误提示}{yyy} $ $\frac{(x+1)\cancel{(x+2)}}{3\cancel{(x+2)}}$ $$\frac{\bcancel{\frac13}}{\bcancel{\frac13}} = 1$$ $$|x| = \cases{ x & \text{if } x\ge 0\cr -x & \text{if } x\lt 0 }$$

包含编号的方程式$$ \begin{equation*} e^{\pi i} + 1 = 0 \end{equation*} $$ In equation \eqref{eq:sample1}, we find the value of an interesting integral: $$ \begin{equation} \int_0^\infty \frac{x^3}{e^x-1}\,dx = \frac{\pi^4}{15} \label{eq:sample1} \end{equation} $$

Drag the sliders to change the values of the coefficients a0,a1,a2,a3,a4,a5 of the polynomial $p(x):=a5*x^5+a4*x^4+a3*x^3+a2*x^2+a1*x+a0$. The initial polynomial (when the Reset button is pressed) is of degree $0$.