计算:'W(S7t0H(~'b-L(M5}
3×(3/4)-(3/4)×3+3÷(3/4)-(3/4)÷3=,Y6V)w7D0?3A)a3x(m9S7\6a;k(U4_'W(S7t0H(~'b-L(M5}