Mathematics
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    x(2x-8)<0
    (x-1)(3x+6)<0
    (x-5)(x+3)>0
    X^2+3X-0.3>0
    2(5x+9) = 3(3x+9)
    1-(x-1)/3=x
    0.65:0.75
    96÷x<140
    (x+3)*(x+1)<=0
    -2/a>3
    a^2^0.5<0.5
    x^2+2x-9<0
    abs(1-2x)小于等于2
    3x2-12小于0
    2x^2+9x+9<0
    1.5^3-1.5-1
    -2x<6
    x-3x-2/4>=2(1+x)/3-1
    (4—2x)(30—2x)=600
    x^3-9x^2-9x+81=0

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