10^(-n)<0.0006
    x²+7x+12<0
    x^2-2x-3<=0
    abs(sin(x)*x)≤abs(x)
    abs(sin(x)*x)≥abs(x)
    2x^2-3x+4<1
    x^2+6x+10>0
    x^2-2sqrt（5）x+sqrt（5）>0
    x-1/x>=2
    x-1/2>=2
    2x-1/3x+6≥0
    a²-4a-8≥0
    2m²-5m+2＞0
    2^x+2^(1-x)-3>0
    2^x+2^(1-x)>0
    40*x-40<4*x^2+5
    (m+1)^2-4*m>0
    4sqrt（m）十2m十2≥18
    4ax<17
    4/k>1

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