IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
fun exp compose T:Type, n:, h,f:(TT). f^n o h = primrec(n;h;i,g. f o g)
By:
RepeatFor 2 (Analyze 0) THEN NatInd -1 THEN Unfold `fun_exp` 0 THEN Reduce 0