1×1×1.1×0.45×10^(-3)×200×1426√((2+0.6×0.65)√30×0.00201×250)+0.75×10^(-3)×330×(1884+509)×0.707
    1+4+3+2+1
    143+21
    0.6×1.642×1.437
    862.56/(365.60×1.437)
    76.50+(496.7－76.50)(2×6.801)/(19.5)
    76.50+(496.7－76.50)(2×6.801 )/(19.5^ )
    76.50+(490.96－76.50)(2×6.801)/19.5
    1685.7×(1－(4×6.801^2)/(19.5^2 ))
    1679.97×(1－(4×6.801^2)/(19.5^2 ))
    (180-48-48)/2
    16.1×1600×17.49(1500－25.23/2)
    16.1×1600×17.49*(1500－17.49/2)
    13.8×1600×27(1500－27/2)
    16.1×1600×17.49(1500－17.49/2)
    1×1×1.1×0.45×10^(-3)×200×1415√((2+0.6×0.88)√30×0.00201×250)
    1×1×1.1×0.45×10^(-3)×200×1415√((2+0.6×0.881)√35×0.0018×250)+0.75×10^(-3)×330×(2513+509)×0.707
    1460.46/(230.99×1.415)
    76.50+(496.7－76.50)(2×3.564 )/19.5
    0.25*7.6+2.5*0.24

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