y＾3-3y-1>0
    -x^2+2x>x+2
    1-3y＾2+2y＾3>0
    1-1/√1+（2000πx）^2≤0.05
    5x^2-8x+4<1
    (3x+2)(3x-4)≥9(x-2)(x+3)
    m^2+1+sqrt（（m^2+1）^2+4m^2）＜-2m
    m^2+1+sqrt（（m^2+1）^2+4m^2）＞-2m
    m^2+1-sqrt（（m^2+1）^2+4m^2）＞-2m
    m^2+1-sqrt（（m^2+1）^2+4m^2）＜ -2m
    3x>3
    3x^2+6x-70000≤1000000
    x^-2x+3>0
    0<4x-78<10
    x^2-10x+20≥60
    x^2-10x+20≥50
    x^2-100x+2000≥100
    x^2-100x+2000≥45
    x^2-100x+2000≥50
    x^2-100x+2550≥50

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