25*17
    1621.67*9.65+3321.78*3.18+92.28*24.5+332.66*19.5-1.25(1544.43*14.07+1891.75*3.29)
    1719.83*9.44+2864.49*3.05+113.3*24.5+379.38*19.5-1.25*(1656.36*14.11+1926.4*3.16)
    914.43*8.57+468.56*2.32-113.3*15.59-379.38*10.59-931.15*1.97
    29.39*5.87+422.29*1.85-113.3*7.18-379.38*2.18
    ln1.2-3
    （4*11.71+20.96*8.24+793.59*3.41+31.4*0.22-99.28*10.64-2.75*0.019）/5.64
    （8.9*11.62+20.49*8.46+849.12*3.65+45.58*0.31-113.3*10.73-9.32*0.064）/5.73
    1/4.537
    1.3*3.49
    4680/3600
    23400/5
    275-193
    0.0157/5.4
    （8.9*7.79+20.49*4.63+371.48*1.75-54.22*0.6）/6.9
    0.00924259025792*5.86
    0.0084^0.98
    1429.208153627418369*22400
    0.0084^-1.52
    1621.67*9.65+3321.78*3.18+92.28*24.5+332.66*19.5-1.25*(1544.43*14.07+1891.75*3.29)

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