60×（3/4 -2/3 +2/5）;u;A+R1E'R*}3q*o4B0y:Y
算式：提示)P1g-\;u;A+R1E'R*}3q*o4B0y:Y
=/y5X4P,_,s1W6x*J3L/n(B,p'D;u;A+R1E'R*}3q*o4B0y:Y