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    880.180≤2×14300×0.5^3×(sin(180×x))^3÷3+14300×0.27×0.5^2×(1-sin(180×2×x)/(6.283×x))×(0.4375)×(sin(180×x)+sin(180×(1.25-2×x)))÷(1.25-3×x)
    722.98≤2×14300×0.45^3×(sin(180×x))^3÷3+14300×0.27×0.45^2×(1-sin(180×2×x)/(6.283×x))×(0.45-0.06)×(sin(180×x)+sin(180×(1.25-2×x)))÷(1.25-3×x)
    722.98≤2÷3×14300×0.45^3×(sin180x)^3+14300x×0.45^2×(1-(sin360x)÷(6.2831853x))×(0.45-0.06)×(sin180x+sin(180(1.25-2x))÷(1.25-3x)
    722.98≤2÷3×14300×0.91125×(sin180x)^3+14300x×0.45^2×(1-(sin360x)÷(6.283x))×(0.45-0.06)×(sin180x+sin(180(1.25-2x))÷(1.25-3x)
    809.83≤2÷3×14300×0.45^3×(sin180x)^3+14300x×0.45^2×(1-(sin360x)÷(6.283x))×(0.45-0.06)×(sin180x+sin(180(1.25-2x))÷(1.25-3x)
    722.98≤2÷3×14300×0.45^3×(sin180x)^3+14300x×0.45^2×(1-(sin360x)÷(6.283x))×(0.45-0.06)×(sin180x+sin(180(1.25-2x))÷(1.25-3x)
    722.98≤2×14300×0.45^3×(sin180x)^3÷3+14300x×0.45^2×(1-(sin360x)÷(6.283x))×(0.45-0.06)×(sin180x+sin(180(1.25-2x))÷(1.25-3x)
    722.98≤2×14300×0.45^3×(sin180x)^3+14300x×0.45^2×(1-(sin360x)÷(6.283x))×(0.45-0.06)×(sin180x+sin(180(1.25-2x))÷(1.25-3x)
    {0.92x+0.98(900-x)}÷900≥0.94
    (92%x+98%×(900-x))÷900≥94%
    1320.270≤2×14300×0.125×(sin(180×x))^3÷3+3575x×(1-sin(180×2x)/(6.283x))×0.4375×(sin(180×x)+sin(180×(1.25-2x)))÷(1.25-3x)
    880.180≤2×14300×0.125×(sin(180×x))^3÷3+3575x×(1-sin(180×2x)/(6.283x))×0.4375×(sin(180×x)+sin(180×(1.25-2x)))÷(1.25-3x)
    880.180≤2×14300×0.125×(sin(180×x))^3÷3+1125.5x×(1-sin(180×2x)/(6.283x))×0.4375×(sin(180×x)+sin(180×(1.25-2x)))÷(3.1416×(1.25-3x))
    880.180≤11225.5×(sin(180×x))^3÷9.425+1125.5x×(1-sin(180×2x)/(6.283x))×0.4375×(sin(180×x)+sin(180×(1.25-2x)))÷(3.1416×(1.25-3x))
    880.180≤2/3×14.3×785×0.5×(sin(180x))^3/3.1416+(x×14.3×785×(1-sin(2×180x)/(2×3.1416x))/(1.25-3x)×0.4375/3.1416×((sin(180x)+sin(180×(1.25-2x)))
    (2/3)^k<(0.045/8.016)
    (8*(2/3)^k)/(45-16*(2/3)^k)<0.001
    1 - x < x ^ 2 - 1
    -1<1-x
    
x-1>1

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