The Lorenz Equations.

E=mc^2

\begin{align}

\dot{x} & = \sigma(y-x) \\

\dot{y} & = \rho x – y – xz \\

\dot{z} & = -\beta z + xy

\end{align}

Add \(a\) squared and \(b\) squared to get \(c\) squared. Or, using a more mathematical approach:

\begin{equation}

a^2 + b^2 = c^2

\end{equation}

Einstein says

\begin{equation}

E = mc^2 \label{clever}

\end{equation}

He didn’t say

\begin{equation}

1 + 1 = 3 \tag{dumb}

\end{equation}

This is a reference to

\eqref{clever}.

References do not work. Acknowledged.