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    (3+2/x)*(8+2/(2-x))
    1.03X+0.92(1-x) <0.98
    1.03X+0.88(1-x) <0.98
    1.03X+0.98(1-x) <0.98
    e^x-x^2-2*x-1≤0
    e^x-x^2-2*x-1>0
    x+1≥0.8*sqrt(x+2)
    e^x-1-(x+x^2)≤0
    e^x-1-(x^2+0.5*x^3)≤0
    e^x-1-(2/3*x^2+1/3*x^3)≤0
    e^x-1-(1+x+x^2)≤0
    e^x-1-1.5*(x+0.5*x^2)≤0
    e^x-1-1*(x+0.5*x^2)≤0
    e^x-1-2*(x+0.5*x^2)≤0
    e^x-1-2*(2+x)≤0
    e^x-1-0.5*(2+x)≤0
    e^x-1-0.8*(2+x)≤0
    e^x-2*(1+x)≤0
    x^3/27-x+1>0
    2.5x*x*x/(4-x*x)+x*x+1.5x+1>0

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