9x²-6x + 1>0
    (x-2)(x + 3)<0
    -x²+5x-8≥0
     -x2 + 5x - 8≥0
    sqrt(x-1)-sqrt(2x-1)≥sqrt (3x-2)
    x^2-9>1
    X^3+X^2+X+1>5
    2x^2-x+5>0
    2x-5>-3（x-5）
    50x+35(600-x)>=26400
    ((x^2)-4x+1)/((3x^2)-7x+2)≤1
    sinx≥0
    (2x-6)(x+5)(x+5)＜0
    x2e-5x+4<0
    -X^2+4≥0
    23x^3-330x^2+1200x+1100+1800x <1.9260*5000
    23x^3-330x^2+1200x+1100+1800x <1.5280*5000
    23x^3-330x^2+1200x+1100+1800x <1.1690*5000
    23x^3-330x^2+1200x+1100+1800x <0.3540*5000
    23x^3-330x^2+1200x+1100+1800x <1.9260*10000

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