Test Mathjax
This is the first
$\sqrt{3x-1}+(1+x)^2$
some line in between
$$ \left{ \begin{align} \dot{x} & = \sigma(y-x) \newline \dot{y} & = \rho x - y - xz \newline \dot{z} & = -\beta z + xy \end{align} \right. $$
$\sqrt{3x-1}+(1+x)^2$
some line in between
$$ \left{ \begin{align} \dot{x} & = \sigma(y-x) \newline \dot{y} & = \rho x - y - xz \newline \dot{z} & = -\beta z + xy \end{align} \right. $$