（200+2）* x +(200+200)*(1-x) <=218
    （200+2）* x +(200+200)*(1-x) <=218
    3x+4>x
    2（x-1）>=x-3
    3-x>1
    8400/(103+x)+10000/(123.6+x)<150
    6000/x + 10000/(x+22.4) + 10000/x < 150
    4400/x + 10000/(x+22.4) + 10000/x ＜ 150
    3800/(112+x)+10000/(134.4+x)+10000/(112+x)<150
    7800/(112+x)+10000/(134.4+x)+10000/(112+x)<150
    7800/(103+x)+10000/(123.6+x)＜150
    abs(x^2-3*x+2)>abs(x-1)
    (x-1)*e^x<0
    x^3-x^2-e+1>=0
    x^3+5*x^2-x-1>=0
    x^x^x^cosx-9^9<999999999999
    x^x^x<999999999999
    cos3+isinx>5
    6456+755x^2<=9557
    6456+755x^2<=2

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