(70×10^3×409.2-1.0×14.3×500×9.8×(465-9.8/2))/(300×(465-35) )
    (159×10^3×298-1.0×14.3×500×22.2×(465-22.2/2))/(300×(465-35) )
    (159×10^3×298-1.0×14.3×500×22.2×(465-22.2/2))/(300×(565-35) )
    194.2+500/2-35
    (70×10^3)/(1.0×14.3×500)
    (12.2×10^3)/70
    1+1/(1300×(10/70×10^3+20)/(500-35)) ×〖(5000/500)〗^2×1
    (0.5×14.3×500×500)/(70×10^3 )
    1.25×(0.6×0.6×6.2)×25
    (159×10^3×298-1.0×14.3×500×22.2×(565-22.2/2))/(300×(565-35) )
    (2035.5×10^3×466-1.0×14.3×600×237.2×(665-237.2/2))/(300×(665-35) )
    82.9+500/2-35
    0.518×465
    (159×10^3)/(1.0×14.3×500)
    (10×10^3)/159
    1+1/(1300×(6/159×10^3+20)/(500-35)) ×〖(5000/500)〗^2×1
    (0.5×14.3×500×500)/(159×10^3 )
    34-12* 1/6
    5/(0.289×0.5)
    1.25×(0.6×0.6×8+0.6×0.7×5.25)×25

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