m(4m-4)>-1
    -4k>-4
    -(a-1)^2-4>0
    a^2-2a+5<0
    789*(x+46.6%+55.1%+1)>=900*(1+x+46.6%+27.6%)
    789*(x+46.6%+55.1%)>=900*(x+46.6%+27.6%)
    0.466/（0.117X+1.361）≥0.534/6.12
    1-(0.7)^n>=0.9
    -(3x-6)<15
    3x-4≤6+x
    3x−4≤6+x3x-4≤6+x
    66*x^13-143*x^12+78*x^11>0.95
    66*x^13-143*x^12+78*x^11>0.8
    66*x^13-143*x^12+78*x^11>0.5
    (1+x^2)/(1+x^4)<=
    (2k-3)^2-4[k(4k-2)]>0
    （m-3）^2-4m>=0
    （300-20sqrt(3)t)^2+(20t)^2<=（250+10t)^2
    （300-20sqrt(3)t)^2+(20t)^2<=250^2
    （300-20sqrt(3))^2+(20t)^2<=250^2

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