# test1

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

$a=a+2$

a = b+2

$b + c + d + eeee + ff + \sum{} + \int =$

$a+2 = c$

$$
\begin{align}
3d &= 2 \\
&= a + c
\end{align}
$$

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