\begin{tabbing}
(\=(((((InstHyp [0] ({-}1)) \+
\\[0ex]CollapseTHENA ((Auto\_aux (first\_nat 1:n) ((first\_nat 2:n
\-\\[0ex])\=,(first\_nat 3:n)) (first\_tok SupInf:t) inil\_term)))$\cdot$) \+
\\[0ex]CollapseTHEN (Reduce ({-}1)))$\cdot$) 
\\[0ex]
\\[0ex]CollapseTHEN ((Auto\_aux (first\_nat 1:n) ((first\_nat 1:n),(first\_nat 4:n)) (first\_tok :t
\-\\[0ex]) inil\_term)))$\cdot$
\end{tabbing}