x^2-2x+2>0
    3-x>=0 x-2=0
    -1<1/(x-1)<1
    -1
    x+1/2<1/(x-1)
    x+1/2<1/x-1
    2x-3≥6
    1/x>x
    1+(3x+4)(3x-4)<9(x-2)(x+3)
    1<=((73*a^2+28*a+4)^(1/2)+11*a+2)/(4*a)<=4
    1<=-((73*a^2+28*a+4)^(1/2)-11*a-2)/(4*a)<=4
    1<=x+1
    10x-6/x>=28
    2a+1>0 3-2a>0
    1/k<(0.9)^k
    12×(A^2)-7A+6 ≤0
    12×A^2-7A+6≤0
    (1/(1+x^(1/8)))≤(lnx)/(x^(1/2))
    1/(1+x^(1/8))≤(lnx)/(x^(1/2))
    x^(-8/15)*(（（lnx)/8）-1)-x^(-2)>0

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