\begin{tabbing}
(\=(((Unfold `lt\_int` 0) \+
\\[0ex]CollapseTHEN (RWH (ReduceThenC (Auto\_aux (first\_nat 1:n
\-\\[0ex])\= ((first\_nat 1:n),(first\_nat 4:n)) (first\_tok :t) inil\_term)) 0))$\cdot$) \+
\\[0ex]CollapseTHENA (
\-\\[0ex](Auto\_aux (first\_nat 1:n) ((first\_nat 1:n),(first\_nat 3:n)) (first\_tok :t) inil\_term)))$\cdot$
\end{tabbing}