x^2+2x>3
    √2m+2<2
    130=<18x+26*（6-x)=<140
    40000:x≤150
    30000:x+10000:（x+6.6）≤150
    x²－2xlnx＞0
    x²－2lnx＞0
    -10x^2+7x-4<0
    1296000≤14670x-8x²
    x^2+x<0
    x＋3＜8
    3n/(8n-4)>37499/100000
    3n/8n-4>37499/100000
    lnx≤-1/x
    0.0975X+0.1030*(7.507775-X)＜1.50459
    （1278+967x)*1.058573＜1033(1+x）+311
    （1278+967x)*1.0524＜1033(1+x）+311
    （1278+967x)*1.0647＜1033(1+x）+311
    （1278+967x)*1.0594＜1033(1+x）+311
    （1278+967x)*1.0629＜1033(1+x）+311

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