This site features a Markdownlike way to format text that looks better than plain text. It doesn't do anything fancy like change the font size, color or type.
Blank lines separate paragraphs.
Urls become links, except in the text field of a submission.
Type  ... to Get 

*Italic*  Italic 
\$ \* \\  $ * \ 
> Blockquote  Blockquote 
* List * List * List 

`Inline code` with backticks  Inline code with backticks 
``` #code block``` print `hello world` print 'fenced block' ``` 

$ \$ $\phi = \frac{1 + \sqrt{5}}{2}$ \$ $  $\phi = \frac{1 + \sqrt{5}}{2}$ 
$$ \phi = \frac{1 + \sqrt{5}}{2} $$ 
$$\phi = \frac{1 + \sqrt{5}}{2}$$ 