\begin{tabbing}
(\=(((D 0) \+
\\[0ex]CollapseTHENA ((Auto\_aux (first\_nat 1:n) ((first\_nat 1:n),(first\_nat 3:n
\-\\[0ex])\=) (first\_tok :t) inil\_term)))$\cdot$) \+
\\[0ex]CollapseTHEN (((OnVar `n' CompNatInd) 
\\[0ex]CollapseTHENA (
\-\\[0ex](Auto\_aux (first\_nat 1:n) ((first\_nat 1:n),(first\_nat 1000:n)) (first\_tok :t) inil\_term)))
\\[0ex]$\cdot$))$\cdot$
\end{tabbing}