\begin{tabbing}
(\=(((((((((((ParallelOp ({-}1)) \+
\\[0ex]CollapseTHEN (RW assert\_pushdownC ({-}1)))$\cdot$) 
\\[0ex]
\\[0ex]CollapseTHENA ((Auto\_aux (first\_nat 1:n) ((first\_nat 1:n),(first\_nat 4:n)) (first\_tok :t
\-\\[0ex])\= inil\_term)))$\cdot$) \+
\\[0ex]CollapseTHEN (HypSubst ({-}1) 0))$\cdot$) 
\\[0ex]CollapseTHEN (Reduce 0))$\cdot$) 
\\[0ex]
\\[0ex]CollapseTHEN ((Auto\_aux (first\_nat 1:n) ((first\_nat 1:n),(first\_nat 3:n)) (first\_tok :t
\-\\[0ex])\= inil\_term)))$\cdot$) \+
\\[0ex]CollapseTHEN (Try ((((Unfold `last` 0) 
\\[0ex]CollapseTHEN (Reduce 0))$\cdot$) 
\\[0ex]
\\[0ex]CollapseTHEN ((Auto\_aux (first\_nat 1:n) ((first\_nat 1:n),(first\_nat 4:n)) (first\_tok :t
\-\\[0ex]) inil\_term)))$\cdot$))$\cdot$
\end{tabbing}