3>=k+1/3
    -10>n/3-5
    k-6/4>-3
    n/4<-13
    -9+n<60
    304>=-76x
    -96x<-8352
    17>m/10
    -x^2-x^6＜0
    -10+x>=-28
    x-4/x+2<4
    2^-2x>√2/8
    abs(x)>abs(x^2)
    abs(x)>2x-1
    0.6x+0.4*81>90
    x4-8x2-9<0
    -2x＜-2
    2x＜-2
    2x＜2
    n*(n-1)*(n-2)>6*100000000

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