-sqrt(x+1)<2x+1
    1/2^x <0.0001
    1/2^x <0.0005
    1/2^x <0.005
    1/2^x<0.05
     x^(4/3)-4x+4>0
    sinx＞1/2
    -4≤X<0
    4m^2-4*(2m^2-6)>=0
    0<5t^2-6t<8
    -2x²+x≤-3
    1-x^2>=0
    5t²-12t+1＜0
    4^-x<4-5×2^x
    8x^2+8x-1＜0
    1/n＜E
    －x²+x＞＝0
    -x^2+8>-2x
    1/2^x<1
    0

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