abs5x+3≤6
    1.35*(0.9-X)>1.2
    1.35*（0.9-X）<1.2
    5x+3≤6
    sin(2x)*(11cos(2x-120)-16.5)>20
    2^x>2/x
    4^(x-1)<=1/16
    3^(2-x)>1
    log(1/2,(x+1))<=-1
    log(2,(2-x))>3
    (x-2)/(x+1)>2
    (2-x)/(x-3)<=0
    abs(3-2x)<=1
    abs(3-2x)<=0
    abs(7x-4)>3
    3x^2-5x-2<=0
    x^2+4x-5>0
    2x-3x^2>=0
    (x-2)(3-x)>=0
    3-4x>4

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