2587.2*0.48/2.4=
    2587.2*0.83=
    0.2^(5/3)*15.18*14.92*(0.155/1.155)^(2/3)=
    (0.155/1.155)^(2/3)=
    (0.015^(0.5)*50)^3
    6--4-1
    (360×5026)/(15.7×0.25×1000^2×π)
    0.25×500^2×π
    (360×5026)/(15.7×0.25×500^2×π)
    (360×5026)/(14.3×0.25×600^2×π)
    (360×5026)/(16.7×0.25×600^2×π)
    (100/(1/1.025)^18)*(1/1.025)*(1-(1/1.025)^(5))/(1-(1/1.025))
    (2*(3.3^2-3.2^2))/(2*151.85) +2*(3.3-3.2)/(161.55+0.44*33)*33
    3*10^(-4)*((73.9^2-3.3^2)/40.4)+2.16*10^(-7)*(73.9-3.3)*33/0.8
    (2*(4.05^2-3.2^2))/(2*151.85) +2*((4.05-3.2)/(161.55+0.44*33)*33
    3*10^(-4)*(((73.9^2-4.05^2)/40.4)+2.16*10^(-7)*(73.9-4.05)*33/0.8
    sin120/sin30
    200/[6*e^(-0.91160774)-6*e^(-1.0939293288)]
    arctan(0.035/0.8)
    (2*10^(-2)*(4.05^2-3.2^2))/(2*151.85) +2*10^(-2)*((4.05-3.2)/(161.55+0.44*33)*33

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