\begin{tikzpicture}[baseline]
    \draw (0,-.5)  -- (.5,.5);
    \draw (.5,-.5) .. controls (.75,0) .. (1,-.5);
\end{tikzpicture}
+
2
\begin{tikzpicture}[baseline]
    \draw (1,-.5)  -- (.5,.5);
    \draw (.5,-.5) .. controls (.25,0) .. (0,-.5);
\end{tikzpicture}
