\begin{tabbing}
(\=(((((((((((((((RWO "cons\_sublist\_cons" 0) \+
\\[0ex]CollapseTHENA ((Auto\_aux (first\_nat 1:n
\-\\[0ex])\= ((first\_nat 1:n),(first\_nat 3:n)) (first\_tok :t) inil\_term)))$\cdot$) \+
\\[0ex]CollapseTHEN (OrLeft))
\-\\[0ex]$\cdot$\=) \+
\\[0ex]CollapseTHEN ((Auto\_aux (first\_nat 1:n) ((first\_nat 1:n),(first\_nat 3:n)) (first\_tok 
\-\\[0ex]:\=t) inil\_term)))$\cdot$) \+
\\[0ex]CollapseTHEN (RWO "cons\_sublist\_cons" 0))$\cdot$) 
\\[0ex]CollapseTHENA (
\-\\[0ex](\=Auto\_aux (first\_nat 1:n) ((first\_nat 1:n),(first\_nat 3:n)) (first\_tok :t) inil\_term)))$\cdot$)\+
\\[0ex]
\\[0ex]CollapseTHEN (OrRight))$\cdot$) 
\\[0ex]CollapseTHEN ((Auto\_aux (first\_nat 1:n) ((first\_nat 1:n
\-\\[0ex])\=,(first\_nat 3:n)) (first\_tok :t) inil\_term)))$\cdot$) \+
\\[0ex]CollapseTHEN (Easy))$\cdot$
\-
\end{tabbing}