Test^2

Consider, $$ \begin{equation}\label{eq:gravt} F=G\frac{mM}{r^2} \end{equation} $$ and, $$ \begin{equation}\label{eq:gravo} F=mg \end{equation} $$ Combining ($ \ref{eq:gravt} $) and ($ \ref{eq:gravo} $) yield, $$ g=G\frac{M}{r^2} $$