I.   Determine which formulas are well-formed.

           A.   (P -> Q -> R)

           B.   (P -> Q) v (R v B)

           C.   [(P -> S) & (F <-> G)] <-> (G & ~Q)

           D.   ((L & F))

           E.   (T v S)

           F.   Z -> [R -> (P v G)]

           G.   v P -> W

           H.   ~~~~F

           I.   T -> [(G -> Y) & (F v B)

           J.   F ~F &