-1<-0.5
    -1>-0.5
    -1<-x
    4x^-8x+4＞0
    x^2+6x+1<0
    5400x^2-5400x-10000<0
    7x^2-22x+15>0
    5400x^2-5400-10000<0
    9m^2-4m-12<0
    （a²+1）(a-1)>0
    0.05x+0.005x^2>10
    0.1x+0.01x^2>12
    x/(x-1)>0
    -(2x-4)/(x-1)>0
    m^3-3*m^2+2<0
    -8m^2-4m>-3
    -8m^2-4m>1
    25x*x+60x+33>0
    (40-30+m-40)(40-m+40)≥525
    1/（x-3）+1/（x-2）>= 1

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