ns- (f+ nc) means that f+ nc is subtracted from ns: ns- (f+ nc)= ns- f- nc.
p = ns(f + nc)
would result in:
p = nsf + n2sc
However with p = ns - f - nc, is that not the process of taking ns, deducting f from the result, and then deducting nc from that? Or is it instead the multiplication of ns * -f * -nc
Hope someone can clear this up for me!