abs((x+3)(x-1))<2x
    log（2，n）<1000000
    2≤absx-1<3
    4m*m-4m<0
    1+3m≤-1
    1+3m＞-1
    4^-a≤0.01
    1+2a>a-2
     (x-4)(x+5)-x(2x+3) <-(x+2)^2
    -1000x≤-0.223
    -1000x≤0.223
    ex≥0.8
    e-1000×x≥0.8
    e-1000x≥0.8
    3（x-1）^2+24>2（x+1）^2
    3x-5x≥-8+3x-5≤17
    2（x-1）<-4
    4<1-3x<7
    14>3x-1≥-10
    6（x+2）≥24

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