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
    16x－x²≤17
    300+80x>x
    3000>x
    -1/2x^2-3x-5/2<0
    -1/2x^2-3x-5/2>0
    (-4)×a-4/4>0
    -4a-4/4>0
    sqrt(5-4*x-x^2)≥x
    sqrt(5-4*x-x^2)≤x
    2x>1-x x+2<4x-1
    -6t＞15
    x²-4x-5≤0
    -7n+3n^2>20000

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