\begin{tabbing}
(\=(((((Repeat (Unfolds \+
\\[0ex]``equiv\_rel refl sym trans`` 3)) 
\\[0ex]CollapseTHEN (Unfold `member` 0
\-\\[0ex])\=)$\cdot$) \+
\\[0ex]CollapseTHEN (PrimEqCD))$\cdot$) 
\\[0ex]CollapseTHENM ((Auto\_aux (first\_nat 1:n) ((first\_nat 
\-\\[0ex]1:n),(first\_nat 3:n)) (first\_tok :t) inil\_term)))$\cdot$
\end{tabbing}