ln(x^2-lnx)-x^(1/x)<-1
    ln(1+1/x^2)-（1+x^2）^(1/2)+x>=0
    ln(1+1/x^10000000)-(1+x^10000000)^(1/10000000)+x>=0
    ln(1+1/x^100000)-(1+x^100000)^(1/100000)+x>=0
    ln(1+1/x^1000)-(1+x^1000)^(1/1000)+x>=0
    ln(1+1/x^10)-(1+x^10)^(1/10)+x>=0
    ln(1+1/x^4)-(1+x^4)^(1/4)+x>=0
    ln(1+1/x^3)-(1+x^3)^(1/3)+x>=0
    20/x+10/(x-2)=35 x>4
    20/x+10/(x-2)=35 x>4
    （-x-1）（2x-6）≥0
    1<2<3<4<5<=5>4>3>2>1
    1<2<3<4<5<5>4>3>2>1
    1
    1>x<=3
    x>1<=3
    x>1 x<=3
    （x-2）（2x+6）＜0
    X1+X4+X5+X6+X7≥14
    x^3>=0

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