1/2（5x＋3)×（5x＋3)×（5x＋3)＋32＝0
    4x²-12x+9=81
    （15-3x）（20-4x）=108
    5.0756=（（28.02*0.639（x+0.1））/（1+0.639（x+0.1））*（（100-6.66-1.14）/100）*（1/(1+0.31*1.14）+（（0.76（x+0.1））/（1.3*0.101325））
    2.9452=（（28.02*0.639（x+0.1））/（1+0.639（x+0.1））*（（100-6.66-1.14）/100）*（1/(1+0.31*1.14）+（（0.76（x+0.1））/（1.3*0.101325））
    2.9452=（（19.457*0.634（x+0.1））/（1+0.634（x+0.1））*（（100-17.84-1.23）/100）*（1/(1+0.31*1.23）+（（3.76（x+0.1））/（1.427*0.101325））
    2x^4＝4x-8
    1+q+q^2+q^3=5
    x（33-3x）=100
    x（33-3x）=90
    x^10-55*x^9+1320*x^8-18150*x^7+157773*x^6-902055*x^5+3416930*x^4-8409500*x^3+12753576*x^2-10628640*x^1+3628800*x^0=0
    1*x^10-55*x^9+1320*x^8-18150*x^7+157773*x^6-902055*x^5+3416930*x^4-8409500*x^3+12753576*x^2-10628640*x^1+3628800=0
    1*x^4+-18*x^3+119*x^2+-342*x^1+360
    1*x^3-12*x^2+47*x-60=0
    2x^2-10x+12=0
    1*x^10-145*x^9+9420*x^8-361050*x^7+9040773*x^6-154530705*x^5+1825849430*x^4-1839503012*x^3+250204248*x^2-429305824*x+213837312=0
    1*x^10-145*x^9+9420*x^8-361050*x^7+9040773*x^6-154530705*x^5+1825849430*x^4-1839503012*x^3+250204248*x^2-429305824*x^1+213837312=0
    1*x^10+-145*x^9+9420*x^8+-361050*x^7+9040773*x^6+-154530705*x^5+1825849430*x^4+-1839503012*x^3+250204248*x^2+-429305824*x^1+213837312=0
    1*x^10-145*x^99420*x^8-361050*x^79040773*x^6-154530705*x^51825849430*x^4-1839503012*x^3250204248*x^2-429305824*x+1213837312=0
    1*x^10-145*x^99420*x^8-361050*x^79040773*x^6-154530705*x^51825849430*x^4-1839503012*x^3250204248*x^2-429305824*x^1213837312=0

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