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
    2x+3>0
    a*3
    2÷3×X－3÷X＞7
    1/（2-3x）>0
    e（-4.647*100*x） <0.0001
    (45-40)a+(60-50)(200-a)≤1600
    a(24-20)+(100-a)(35-30)≥468

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