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
    0.25*7.8*40
    0.6×2.24×1.426
    0.6×3×1.415
    1196.39/(374.26×1.426)
    1447.87/(230.55×1.415)
    76.50+(655.51－76.50)(2×3.564)/19.5
    76.50+(490.96－76.50)(2×3.624)/19.5
    1685.7×(1－(4×3.564^2)/(19.5^2 ))
    1685.7×(1－(4×5.253^2)/(19.5^2 ))
    1679.97×(1－(4×3.624^2)/(19.5^2 ))
    1648.41×(1－(4×6.571 ^2)/(19.5^2 ))
    6438.41×(1－(4×6.571^2)/(19.5^2 ))
    1648.41×(1－(4×6.141^2)/(19.5^2 ))
    arctan (2/11)
    1×1×1.1×0.45×10^(-3)×200×1426√((2+0.6×0.656)√35×0.00201×250)+0.75×10^(-3)×330×(1884+509)×0.707
    1×1×1.1×0.45×10^(-3)×200×1426√((2+0.6×0.65)√30×0.0018×250)+0.75×10^(-3)×330×(1884+509)×0.707
    3000∧(2/3)*7.1

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