-0.01x^2+1.7x-1-0.3x≥55
    x^3-10x^2+23x-14>0
    （2x-5）^(2)+（3x+1）^(2)>13（x^(2)-10）
    3x-5/2x+1≤1
    (a-2)*3*3-2(a+3)*3+4a<0
    (a-2)*2*2-2(a+3)*2+4a<0
    4(a-2)-4(a+3)+4a<0
    9(a-2)-6(a+3)+4a<0
    （X＋1）^(2)－4×（2x－1）×（x－4）>=0
    -857+x-x×8%/4≥10
    x^(2)-2x-3>0
    0.225*x>(ln(1+x))
    0.225>x*(ln(1+(1/x)))
    (1/x+2x)^4
    ln(1+2d)<1/1.8
    x*(ln(1+(1/x)))<1/3.6
    0.5x^3-5.5x^2+14x-90>0
    (1562.45+x＋√(1562.45x))×7.13÷3=3225.873
    2√(x+3）+2√3-2≤x+1
    -b/2

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