0.25=50/X
    x^4+6*x^2+8=0
    x^2-x^2e-1.1x-0.01|09=0
    x^2-x^2e-1.1x-0.0127|67=0
    x^2-x^2e-1.1x-0.001|89=0
    x^2-x^2e-1.1x-0.07|23=0
    x^2-x^2e-1.1x-0.0109=0
    x=ln(3+sqrt(5))-ln2
    x-x/1.05*0.05-x/1.05*0.05*0.07*0.5-x/1.05*0.12*0.5-x*0.001*0.5=6000
    x-x/1.05*0.05-x/1.05*0.05*0.07*0.5-x/1.05*0.12*0.5-x*0.001*0.5=4800
    x-x/1.05*0.015-x/1.05*0.015*0.07*0.5-x/1.05*0.02=16800
    lnx=12.15
    50 = 359.45x - 6.8462
    0.3=（（0.021*x^1.85+128.7）^0.5）*x^0.84
    0.03=（（0.021*x^1.85+128.7）^0.5）*x^0.84
    11.8=（（0.021*x^1.85+128.7）^0.5）*x^0.84
    6.815=（（0.021*x^1.85+128.7）^0.5）*x^0.84
    X-X*0.065-（x+1000000）*0.0003=1000000
    X-X/1.05*0.015-X/1.05*0.015*0.07*0.5-(X-X/1.05*0.015)*0.02-(X-X/1.05*0.015)*0.005=27600
    （4x＋8）/（3x＋24）＝5/6

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