(1/2)^x>x^2
    2^n+1-2＞2022-n^2
    (49.9-50x-8)/49.9＜(169-200x-8)/169
    (49.9-50x-8)/49.9＞(169-200x-8)/169
    (49.9-50x-8)/49.9＞（196-200x-8）/169
    m∧2－4+m＜0
    m∧2－6+m＜0
    （2k+1）^2-4(k+0.5)>0
    x^2-15*x-2000<0
    m^2+6*m-2<0
    9*m^2+38*m+9<0
    1.2（y－6）＋0.5y≤40
    1.2y＋0.5（y－6）≤40
    1.2y＋0.5（y＋6）≤40
    (-1)^x＞0
    log(x,-x)＞0
    lgx＞ln(-x)
    lg-absx＞-1000
    A(4,x)＞100
    !(x)＞3

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