5X-1/6=7/3
    4.545*0.7944/(4.545-1.785397)+2.485*0.2030/(2.485-1.785397)+1*0.002606/(1-1.785397)+0.845*0/(0.845-1.785397) = x+1
    4.545*0.4576/(4.545-1.785397)+2.485*0.1190/(2.485-1.785397)+1*0.2557/(1-1.785397)+0.845*0.1678/(0.845-1.785397)=x+1
    4.545*0.4576/(4.545-x)+2.485*0.1190/(2.485-x)+1*0.2557/(1-x)+0.845*0.1678/(0.845-x)=0.7
    4.545*0.4576/(4.545-x)+2.485*0.1190/(2.485-x)+1*0.2557/(1-x)+0.845*0.1678/(0.845-x)=0.7
    (1-x)/x^(3/2)=0.0009
    (1-x)/x^(3/2)=0.0009
    x*0.13+x=673040
    (57-x)*x*0.02466=4.7
    x^2=(0.01-x)*10^-0.2
    0.39x+lnx=-2.98
    5＝3x－2
    x1222
    x×8+（250-x）×3.8=2080
    （12803-X）/X=0.96
    -x^2-7x-8 =-4x-6
    -x^2-7x-32/4 =-4x-6
    -(x^2+7x+49/4)+17/4 =-4x-6
    -(x+7/2)^2+17/4 =-4x-6
    -x^2-7x-9 =-4x-6

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