Test+1

$\overleftrightarrow{AB}$

Let us have and an equation $ y=3^x $ and compare it to blah.

If I want something centered

\[ x = \frac {-b \pm \sqrt{b^2-4ac} } {2a} \]

Left justified

\( \Large x = \frac {-b \pm \sqrt{b^2-4ac} } {2a} \)

So for Geo a circle $ \odot $ A.

$\settowidth{\mywidth}{PQRSPQ}$ $\bigfrown{PQRSPQ}$

$\overset{\Huge{\frown}}{ABC}$