Markdown test

\begin{align}
\sqrt{37} & = \sqrt{\frac{73^2-1}{122}} \
& = \sqrt{\frac{73^2}{122}\cdot\frac{73^2-1}{732}} \
& = \sqrt{\frac{73^2}{122}}\sqrt{\frac{73^2-1}{732}} \
& = \frac{73}{12}\sqrt{1 - \frac{1}{73^2}} \
& \approx \frac{73}{12}\left(1 - \frac{1}{2\cdot73^2}\right)
\end{align}

f(n) =
\begin{cases}
n/2, & \text{if \(n\) is even} \
3n+1, & \text{if \(n\) is odd} \
\end{cases}

\[\sqrt{37} = \sqrt{\frac{73^2-1}{12^2}} \]