（-1-2lnx）/x＾3＞0
    m^2-m-1>0
    (x+1)^2*(x-1)/x>0
    16x^4+(1/2304)x^2-1/8>0
    16x^4+(1/4608)x^2-1/8>0
    x^4+(1/9216)x^2-1/2>0
    x^4+(1/9216)x^2-1/4>0
    16x^4+4x^2-1<0
    (x+2)/(x-1)<=0
    X^4+(1/9216)X^2-1/4>0
    X^4+(1/4096)X^2-1/4>0
    x^4+(1/4096)x^2-2/3>0
    x^4+(1/4096)x^2-1/2>0
    x^4+x^2-1<0
    m²－m－1>0
    x^2+2*x-3 > 0
    5x^2-17x-40≤0
    3k²+2k-2＞0
    5a*a-4a+1>0
    （x²＋4）^（－1/2）*（x²＋5）≧1

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