计算：-}4C*p-l6O2M*M/~*w*B
18+21+23+20+19+15-}4C*p-l6O2M*M/~*w*B
算式：提示5{5e-I1G-}4C*p-l6O2M*M/~*w*B
=7p+S2v.l5]0a8w:i)J*P-}4C*p-l6O2M*M/~*w*B