5/48*((973.992*10*19500^2)/( 3.88*10^1))*1.60
    (180*1300^2/2+(2200-180)*120^2/2+(6.667-1)*4713*1204)/503108
    5/48*((973.992*10^6*19500^2)/( 3.88*10^15))*1.60
    180*1300+(2200-180)*120+(6.667-1)*4713
    3.88*10^15/((482.09/973.992)^2+(1-(482.09/973.992)^2))*( (3.88*10^15)/(1.53*10^15))
    (2200*181^3)/3-((2200-180)*(181-120)^3)/3+6.667*4713*(1204-181)^2
    (1521.23^2+581950.79)^0.5-1521.23
    (2*6.667*4713*1204+120^2*(2200-180))/180
    3/8
    1*1.45*1*[169.22/(2*10^5)]*[(34.2+32.5)/(0.36+1.7*0.1)]
    1*1.45*1*[114.58/(2*10^5)]*[(34.2+32.5)/(0.36+1.7*0.1)]
    973.992*10^6/（0.87*1404*4712）
    1+0.5*867.012/973.992
    565.55*10^6/（0.87*1204*4712）
    686.64+0.4*356.60+0.4*94.33
    577.02/(0.25*0.2)
    5.4*1000*11^2
    (0.25*0.2)/(2*0.005*(0.25+0.2) )
    1+0.5*507.97/565.55
    686.64+0.7*356.60+0.4*94.33

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