50n^2-10002n+500000>0
    (1000-10x)/√x>2
    36*(m-1)^2-12*(m^2+1)＞0
    36*(m-1)^2-12(m^2+1)>0
    (（√2）m+1)(（√2）m-1)（2m+1）＜0
    (7*m-6)/20>0
    (m+2)/5<0
    (7*m-6)/20<0
    (m+2)/5>0
    (x+3)/3<(2x-5)/3-1
    12-4(3x-1)<2(2x-16)
    8x-2＞7x
    lnx>10.96155
    ln0.444<(4951.5/x－5.103)
    -x+2≤（-4*x+6)/(x^2-4*x+4)
    -x+2≤（-4*x+6)/(x-2)^2
    sinx>0.5
    sinx>0.7
    x∧4-6sinx≤5x
    1/((2^(5x+3))(x+2)(5x+13))<10^-4

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