\begin{tabbing}
(\=(((((((((Unfold `l\_before` 0) \+
\\[0ex]CollapseTHEN (RWO "cons\_sublist\_cons" 0))$\cdot$) 
\\[0ex]
\\[0ex]CollapseTHENM (RWO "cons\_member" 0))$\cdot$) 
\\[0ex]CollapseTHEN ((Auto\_aux (first\_nat 1:n
\-\\[0ex])\= ((first\_nat 1:n),(first\_nat 3:n)) (first\_tok :t) inil\_term)))$\cdot$) \+
\\[0ex]CollapseTHEN (Reduce 0
\-\\[0ex])\=)$\cdot$) \+
\\[0ex]CollapseTHEN (SimpConcl))$\cdot$
\-
\end{tabbing}