4x^4-12x^2+9=0
    4x^4+12x^2+9=0
    x^(1/4)-1
    x^2(x^4+104x^2+400)=10000
    x^2(x^4+104x^2+400)=40000
    0.036313=1/(0.825-(x+1200)/(x+92834.4))-1/(0.825-x/(x+91634.4))
    0.036313=1/(1-((x+1200)/((x+1200)+91634.4)+0.05+0.025+0.1))-1/(1-(x/(x+91634.4)+0.05+0.025+0.1))
    x*1.015=363.37
    x*1.015=493.29
    x-（1-80%）x=4.8
    （X+9）(X+15)=7216
    9/4x²=x²+10x
    x²+14x=24
    (x-35)*1868/(534-x)*1130.4*206000+(x-115)*1868/(534-x)*1130.4*206000=(162-x)*1868/(534-x)*180*12*206000+1868*206000*22*180
    (x-35)*1868/(534-x)*1130.4*206000+(x-115)*1868/(534-x)*1130.4*206000=(162-x)*1868/(534-x)*180*12*206000+385*22*180
    (x-35)*1868/(534-x)*1130.4*206000=(115-x)*1868/(534-x)*1130.4*206000+(162-x)*1868/(534-x)*180*12*206000+385*22*180
    2/3*((1-1/0.07)+(3/4+1/0.07)*(1/3*220/x*0.35805183739485175)^0.07)=7.04/x
    2/3*((1-1/0.05)+(3/4+1/0.05)*(1/3*220/x*0.35805183739485175)^0.05)=7.04/x
    2/3*((1-1/0.03)+(3/4+1/0.03)*(1/3*220/x*0.35805183739485175)^0.03)=7.04/x
    2/3*((1-1/0.01)+(3/4+1/0.01)*(1/3*220/x*0.35805183739485175)^0.01)=7.04/x

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