2 | 1. Q: Formula Prop 2. f:{f:Formula| Q(f) }.
case f: x 0;  p ( (p)+1);p  q ( (p)+ (q)+1);p  q ( (p)+ (q)+1);p   q ( (p)+ (q)+1);
 3. f: Var+{f:Formula| Q(f) }+({f:Formula| Q(f) } {f:Formula| Q(f) })+
({f:Formula| Q(f) } {f:Formula| Q(f) })+({f:Formula| Q(f) } {f:Formula| Q(f) }) case f: x 0;  p ( (p)+1);p  q ( (p)+ (q)+1);p  q ( (p)+ (q)+1);p   q ( (p)+ (q)+1);  |