Equação A=B: A coincidência B
Equação A=B(com carry):A’*B’*Carry+A*B*Carry

BCD:
S(a)=A[2]’*A[0]’+A[2]*A[0]+A[3]*A[1]’+A[3]’*A[2]’*A[1]

S(b)=A[2]’+A[1]’*A[0]’+A[3]*A[1]’+A[3]*A[0]’+A[3]’*A[1]*A[0]

S(c)=A[0]+A[3]’*A[1]’+A[2]*A[1]+A[3]*A[2]’

S(d)=
A[2]’*A[0]’+A[3]’*A[2]’*A[1]+A[3]’*A[1]*A[0]’+A[2]*A[1]’*A[0]+A[3]*A[1]’*A[0]’+A[3]*A[2]*A[0]


S(e)=A[2]’*A[0]+A[3]’*A[1]*A[0]’+A[3]*A[1]’*A[0]’

S(f)=
A[3]’*A[1]’*A[0]’+A[3]’*A[2]*A[1]’+A[3]’*A[2]*A[0]’+A[3]*A[2]’*A[1]’+A[3]*A[2]’*A[0]’+A[3]*A[2]*A[1]

S(g)=A[2]*A[1]’+A[2]*A[0]’+A[3]*A[1]’+A[3]*A[2]+A[3]’*A[2]’*A[1]