-4.256 * x ^ 3 + 181.748 * x ^ 2 - 2663.508 * x + 15354.783 <1006.57
    -4.256x^3+181.748x^2-2663.508x+15354.783<545.17
    x*ex+1＞0
    x*ex+1＜2*（ex-1）^2
    x²-8x＋12≥0
    X^2+500X-500＜0
    X^2+500X-50＜0
    X^2+650X-65＜0
    （2y－4）²－4（y－2）（3y＋7）≥0
    15*4*X+5*(4+0.15)*X>=18*(1-0.35)*(24-X)+5*(1-0.4)*(24-X)+6*(1-0.25)*(24-X)
    15*4*X+5*(4+0.15)*X>=15*(1-0.35)*(24-X)+5*(1-0.4)*(24-X)
     15*4*X+5*(4+0.15)*(24-X)>=15*(1-0.35)*X+5*(1-0.4)*X
    (1-0.4)*X<=(4+0.15)*(24-X) (1-0.35)*X<=(4)*X 60X+5*4.15X>=3X+0.65*15X
    (1-0.4)X<=(4+0.15)*(24-X) (1-0.35)X<=(4)*(24-X)
    (1-0.4)X<=(4+0.15)*(24-X) (1-0.35)X<=(4+0.15)*(24-X)
    (1-0.4)*19<=(4+0.15)*X (1-0.35)*19<=(4)*X
    (1-0.4)X<=(4+0.15)*(24-X) (1-0.35)X<=(4+0.15)*(24-X)
     (1-0.35)X<=(4+0.15)*(24-X)
    (1-0.4)*x<=(4+0.15)*(24-x)
    (1-0.4)*18<=(4+0.15)*(k-18)

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