{HEAD ~ Combiner} 18 typically includes {TAIL ~ a plurality} of weighting elements 26 and a summer 28 
typically includes
{ HEAD ~ Combiner } 18 typically includes { TAIL ~ a plurality } of weighting elements 26 and a summer 28
HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH