7.863-(0.026+0.039)/2
    (6.1×10^6)/(0.93×236865.58×215)
    1.07-〖78.29〗^2/44000
    1650/21.076
    9.369-4.804
    √(〖(75.88/314.1)〗^2+(〖265.2/502.6)〗^2 )
    (π×40^2)/4×500
    (584.3×0.4125)/(3×〖0.4125〗^2+2×〖0.1875〗^2+2×〖0.0925〗^2+3×〖0.3225〗^2 )+3/10
    √((10.6+1.43)^2+(3.7+8.6)^2 )
    57.6/8×(20×(428-2×35))/36065
    ((49.3×10^3×((20×(428-2×35)^3)/12)/1208900000+68.7×10^3×90)×37.5)/(8×〖37.5〗^2+4×36^2+4×108^2 )
    ((49.3×10^3×((20×(428-2×35)^3)/12)/1208900000+68.7×10^3×90)×0.0375)/(8×〖37.5〗^2+4×36^2+4×108^2 )
    ((49.3×10^3×((20×〖(428-2×35)〗^3)/12)/1208900000+68.7×10^3×90)×108)/(8×〖37.5〗^2+4×36^2+4×108^2 )
    (148.2×10^3)/(35×407)
    (130×10^3)/10605
    148.2×(1-0.5×4/16)
    16×141.75
    0.9×1×2×0.35×225
    49.3/((428-35)×10^(-3) )+57.6×(407×35)/36065
    ［1748×（1+0.0614）×1.1516×1.2609+0］×0.9953

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