<
## Test Mathjax
If you lend me 5\$, I will have 10\$ in my pocket. Do you know $\sqrt{3x-1}+(1+x)^2$ and $x_{1,2} = \frac{-b \pm \sqrt{b^2-4ac}}{2b}.$
And what's this???
$$ \frac{R_a T_{im}}{V_{im}} $$
| Align Left | Align Center | Align Right |
| ------------- |:-------------:| -----:|
| test one | dollar | $1600 |
| double dollar | also works | \$\$12 |
| zebra stripes | are neat | \$\$1 |
Hey, let's do something fantastic.
$$
\mathbf{I}_n = \left. \left(
\vphantom{
\begin{array}{c}
1\\1\\1\\1\\1
\end{array}
}
\smash{
\underbrace{
\begin{array}{ccccc}
1&0&0&\cdots &0\\ 0&1&0&\cdots &0\\ 0&0&1&\cdots &0\\ \vdots&&&\ddots&\\ 0&0&0&\cdots &1
\end{array}
}
_{n\text{ columns}}
}
\right)\right\} \,n\text{ rows}
$$
Beautiful things always happen
$$ \left( \sum_{k=1}^n a_k b_k \right)^2 \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right) $$
Some more basic ones
$$ (a \pm b) \% m \equiv (a \% m \pm b \% m ) \% m $$
$$ a \equiv b \pmod{m} \rightarrow ac \equiv bc \pmod{m} $$
$$ \left.\begin{array}{l} a\equiv b \pmod{m} \\ x \equiv y\pmod{m} \end{array}\right\} ax \equiv by \pmod{m} $$
$$ \left.\begin{array}{l} ac \equiv bc \pmod{m} \\ (c,m)=1 \end{array}\right\} a\equiv b \pmod{m} $$
$$ a \equiv b \pmod{cm} \rightarrow a \equiv b \pmod{m} $$
$$ \left.\begin{array}{l} a\equiv b\pmod{m}\\ n | m \end{array}\right\} a\equiv b\pmod{n}$$
$$ 1 \times 2 $$
## An Identity of Ramanujan
$$ \frac{1}{\Bigl(\sqrt{\phi \sqrt{5}}-\phi\Bigr) e^{\frac25 \pi}} = 1+\frac{e^{-2\pi}} {1+\frac{e^{-4\pi}} {1+\frac{e^{-6\pi}} {1+\frac{e^{-8\pi}} {1+\ldots} } } } $$
# code syntax highlight
## html test
```html
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="keywords" content=""/>
<meta name="description" content=""/>
<link rel="shortcut icon" href="/static/img/favicon.ico"/>
<link rel="stylesheet" type="text/css" href=""/>
<title>title</title>
</head>
<body>
<script type="text/javascript" src="here/but/nowhere.js"></script>
</body>
</html>
```
## python test
``` python
@requires_authorization
def somefunc(param1='', param2=0):
'''A docstring'''
if param1 > param2: # interesting
print 'Greater'
return (param2 - param1 + 1) or None
class SomeClass:
pass
a = int(3)
>>> message = '''interpreter
... prompt'''
```
For `python` use `type(name, bases, dict)` to construct dynamic class and subclass base classes.
## bash test
```bash
#!/bin/sh
dir=.
mode="linear" # linear or recursion
[ ! -z "$1" ] && dir="$1"
shift
echo "playing dir $dir"
while :; do
if [[ "x-l" == "x$1" ]]; then
mode="linear"
elif [[ "x-r" == "x$1" ]]; then
mode="recursion"
elif [[ -z "$1" ]]; then
break
fi
done
IFS=$'\n'
```
# Test nginx config file
```
location ~ \.php$ {
try_files $uri = /404.html;
fastcgi_pass unix:/run/php-fpm/php-fpm.sock;
fastcgi_split_path_info ^(.+\.php)(/.+)$;
fastcgi_param SCRIPT_FILENAME $document_root/$fastcgi_script_name;
fastcgi_index index.php;
include fastcgi_params;
root /usr/share/nginx/html;
}
```
]]>
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