x：1-x＞0
    -1.96<(x-2.5)/0.37<1.96
    (x-2.5)/ 0.37 > -1.96
    -X2+X+2<0
    X2-X=12≥0
    X2-X=12≥0
    2^x<4048+2x
    x²≥2
    3c-6>c
    -2X+1>0
    1200000+450x≤1000000+500x
    4－4m＞0
    3000+A<=4000+A/2
    3000+A<=4000+2/A
    3000+A<=4000+A/2
    10-2X≤5(6-2X)
    X/4-1+10X/7+40X/6<=112
    x/4-1+x+7x<=112
    x/4-1+2x+6x<=112
    3x+2x^2>x^3

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