999999999999999999999999999999999999999999999999999999999999999999999＞x
    -4x^2+sqrt2x+3<0
    -4x^2+sqrt2x+3<=0
    -7a^2+20a+4 <0
    -7a^2+20a+4<0
    （x*1.095）-（x*4%）-（x+x4%*5%）<=800
    23+112.5x<26+94x
    2a-1-e∧a＜0
    x∧4＋6x∧3－11x∧2＋84x＋199＞0
    (300-6*x)*(280+7*x)>480*125
    ln(1-x)>1/(1-x)
    （x-3）（x＋5）＞0
    x/√x+3/x＞4+5x
    x+3＞4x
    cos(x)>sin(x)
    log(x,-1)＞-100000000
    log(x,-1)＞-1
    log(x,1)＞-1
    log(2,1)＞-1
    0fx≥-1

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