888888
    88888
    x-3(x-2)<0
    1+1=3
    8:4:36
    8：4：36
    0.15*15X+0.85*44X=19631*0.53
    0.15*15X+0.85*44X=14338*0.53
    x-(x*0.065)=35966
    x-x*0.065=35966
    5-4/3*（1-2y）
    4/3*（1-2y）
    78.75*32/3.14*1000/20/20/20/（1-0.65^4)
    x-38.68/x=0.5152
    (10.094-1.63)*(1.3/2.7)*40%
    (8.189-2.77)*(1.4/2.7)*90%
    1.3*0.95*0.9*(2.4/2.7)*(10.094-3.44)*30%
    1.3*0.95*0.9*(2.4/2.7)*(10.094-3.44)
    (0.1*19.8228*0.6705)/(1+0.1*0.6705)*((100-0.1438-0.0096)/100)*(1/(1+0.31*0.0096))+0.55/1.4
    (0.1*12.8807*1.5601)/(1+0.1*1.4501)*((100-0.1282-0.0104)/100)*(1/(1+0.31*0.0104))+1.43/1.4

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