Mathematics
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    20x+6>0
    -857+x-x*8%/4≥10
    0.6X+150 = (0.4X+150)*1.4
    x-10/x=0.1
    1+10e2.1x+10e3.43xe2<10
    -X^2+150X≥794
    5000/1100<((1+x)^10-1)/x(1+x)^10
    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

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