IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
can reduce composite factor1a 1. k : {2...}
2. g : {2..k} x,y:{2..k}.
xy<k (h:({2..k}).
({2..k}(g) = {2..k}(h)
(& h(xy) = 0
(& (u:{2..k}. xy<uh(u) = g(u)))