abs(2x+1)>5
    5sinx>2cos2x-4
    2/2x+1>1/21
    （2x-1）/3-(5x+1)/2<=1
    m2-6m+1≥0
    ((2k+1)^2)-4((k-1)^2)≥0
    2t-1<-t
    -1<=2t-1<=1
    x≤2
    2.3x-8.98<0
    log(x,27)<3
    x^12346<1
    x^x<4
    -4a²+4a+7＞-1
    2m＞-m+9
    2m+m＞9
    2m>-m+9
    1/3X+5/3-10/X<0
    -1＜2^x＜1
     log(1/2,2x+1)>-1

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