IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
prime mset complete isext1 1. f : Prime 2. x : Prime prime_mset_complete(f)(x) = f(x)
By:
Def of prime_mset_complete(<term>) THEN Reduce Concl