x*x-3x-2=0
    x*x-3x+2=0
    1.5+1.5*x+1.5*x^2+1.5*x^3+1.5*x^4+1.5*x^5=14.67
    1.5+1.5*x+1.5*x^2+1.5*x^3+1.5*x^4+1.5*x^5+1.5*x^6+1.5*x^7=39.40
    1.5+1.5*x+1.5*x^2+1.5*x^3+1.5*x^4+1.5*x^5+1.5*x^6+1.5*x^7=27.58
    1.5+1.5*x+1.5*x^2+1.5*x^3+1.5*x^4+1.5*x^5+1.5*x^6+1.5*x^7+1.5*x^8=52.11
    1.5+1.5*x+1.5*x^2+1.5*x^3+1.5*x^4+1.5*x^5+1.5*x^6+1.5*x^7+1.5*x^8=36.48
    1.5+1.5*x+1.5*x^2+1.5*x^3+1.5*x^4+1.5*x^5+1.5*x^6+1.5*x^7+1.5*x^8+1.5*x^9=68.63
    1.5+1.5*x+1.5*x^2+1.5*x^3+1.5*x^4+1.5*x^5+1.5*x^6+1.5*x^7+1.5*x^8+1.5*x^9=48.04
    1.5+1.5*x+1.5*x^2+1.5*x^3+1.5*x^4+1.5*x^5=14.67
    1.5+1.5*x+1.5*x^2+1.5*x^3+1.5*x^4+1.5*x^5=20.96
    1.5+1.5*x+1.5*x^2+1.5*x^3+1.5*x^4+1.5*x^5=14.67
    1.5+1.5*x+1.5*x^2+1.5*x^3+1.5*x^4+1.5*x^5+1.5*x^6+1.5*x^7=39.4
    1.5+1.5*x+1.5*x^2+1.5*x^3+1.5*x^4+1.5*x^5+1.5*x^6+1.5*x^7=27.58
    1.5+1.5*x+1.5*x^2+1.5*x^3+1.5*x^4+1.5*x^5+1.5*x^6+1.5*x^7+1.5*x^8=52.11
    1.5+1.5*x+1.5*x^2+1.5*x^3+1.5*x^4+1.5*x^5+1.5*x^6+1.5*x^7+1.5*x^8=36.48
    1.5+1.5*x+1.5*x^2+1.5*x^3+1.5*x^4+1.5*x^5+1.5*x^6+1.5*x^7+1.5*x^8+1.5*x^9=68.63
    1.5+1.5*x+1.5*x^2+1.5*x^3+1.5*x^4+1.5*x^5+1.5*x^6+1.5*x^7+1.5*x^8+1.5*x^9=48.04
    0.337*{（x-sin（2πx）/2π）+（3x-1.25）*0.172}＝2/3*{（sin(πx）)^3/π}+0.172*470/550*{sin(πx)+sin(1.25π-2πx）}/π
    0.708=2/x-2×（1-e^（-x)）/x

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