\begin{tabbing}
(\=(((\=RW (RepeatC (UnfoldsC ``wellfounded guard so\_apply``) \+\+
\\[0ex]ANDTHENC AbReduceC) 0) 
\\[0ex]
\-\\[0ex]CollapseTHEN (D 0))$\cdot$) 
\\[0ex]CollapseTHEN (UnivCD 
\-\\[0ex]THENW (Auto\_aux (first\_nat 1:n
\\[0ex]) ((first\_nat 1:n),(first\_nat 3:n)) (first\_tok :t) inil\_term)))$\cdot$
\end{tabbing}