\begin{tabbing}
(\=(((((BasicSquashHD 4) \+
\\[0ex]CollapseTHEN (UnhideSinceSquashedConcl))$\cdot$) 
\\[0ex]CollapseTHEN (
\-\\[0ex]S\=quashCD))$\cdot$) \+
\\[0ex]CollapseTHEN (HypBackchain))$\cdot$
\-
\end{tabbing}