Math counterexample

gistfile1.md

// Uses $$...$$ delimiters inline
This is a $$
x = {-b \pm \sqrt{b^2-4ac} \over 2a}
$$ block equation

This is a $$ x = {-b \pm \sqrt{b^2-4ac} \over 2a} $$ block equation

// Uses $$...$$ delimiters on their own lines
This is a 

$$
x = {-b \pm \sqrt{b^2-4ac} \over 2a}
$$

block equation

This is a

$$ x = {-b \pm \sqrt{b^2-4ac} \over 2a} $$

block equation