Text formatting 
------------------------------------------------------------

*italic*   _italic_

**bold**   __bold__

`code`

superscript^2^

subscript~2~

Headings
------------------------------------------------------------

# 1st Level Header

## 2nd Level Header

### 3rd Level Header

#### 4th Level Header

Lists
------------------------------------------------------------

*   Bulleted list item 1

*   Item 2

    * Item 2a

    * Item 2b

1.  Numbered list item 1

2.  Item 2

3.  Item 3
    + Item 3a
    + Item 3b

Links
------------------------------------------------------------

<http://example.com>

[linked phrase](http://example.com)

Images
------------------------------------------------------------


```markdown
![](http://example.com/logo.png)

![optional caption text](path/to/img.png)
```

Footnotes
------------------------------------------------------------

A [linked phrase][id].

Then below:

[id]: text of the note

Block quotes
------------------------------------------------------------

As George Box said:

> All models are wrong
> but some are useful.

Tables ---------------------------------------------------

First Header  | Second Header
------------- | -------------
Content Cell  | Content Cell
Content Cell  | Content Cell
Reference Style Links and Images

Equations -----------------------------------------------

$E = mc^{2}$

$$E = mc^{2}$$
