\begin{tikzpicture}
\input{src/tikz/et}
\begin{scope}[et/treestyle,level distance=12mm]
\Tree
[.\texttt{-}
[.\texttt{+} [.\texttt{*} \texttt{10} \texttt{x} ] \texttt{5} ]
[.\texttt{+} \texttt{x} \texttt{3} ]
]
\end{scope}
\end{tikzpicture}