\begin{tabbing} (\=(((((Unfold `pm\_equal` 0) \+ \\[0ex]CollapseTHEN ((Auto\_aux (first\_nat 1:n) ((first\_nat 2:n \-\\[0ex])\=,(first\_nat 3:n)) (first\_tok SupInf:t) inil\_term)))$\cdot$) \+ \\[0ex]CollapseTHEN (Try (D ({-}1))))$\cdot$) \\[0ex] \\[0ex]CollapseTHEN ((Auto\_aux (first\_nat 1:n) ((first\_nat 1:n),(first\_nat 1000:n)) (first\_tok \-\\[0ex]:t) inil\_term)))$\cdot$ \end{tabbing}