This is LaTeX code:
[latex]
\frac{d}{dt}\left( \frac{\partial L}{\partial \dot{p}} \right) - \frac{\partial L}{\partial p} = 0 \\ \frac{d}{dt}\left( \frac{\partial L}{\partial \dot{q}} \right) - \frac{\partial L}{\partial q} = 0 \\
[/latex]