\begin{tabbing}
(\=(((((RWW "select\_cons\_tl" ({-}1)) \+
\\[0ex]CollapseTHENA ((Auto\_aux (first\_nat 1:n) ((first\_nat 
\-\\[0ex]2\=:n),(first\_nat 3:n)) (first\_tok :t) inil\_term)))$\cdot$) \+
\\[0ex]CollapseTHEN (ArithSimp ({-}1)))$\cdot$) 
\\[0ex]
\\[0ex]CollapseTHEN ((Auto\_aux (first\_nat 1:n) ((first\_nat 2:n),(first\_nat 3:n)) (first\_tok :t
\-\\[0ex]) inil\_term)))$\cdot$
\end{tabbing}