x-x*0.065-(x+154.27）*0.0003 = 154.27
    x-x*0.065-(x+5552706.28）*0.0003=5552706.28
    x-x*0.05-(x+11335591.52）*0.0003=11335591.52
    x-x*0.05-(x+9476949.18）*0.0003=9476949.18
    600+480/x=-0.04*(70+105/(1+2.5/x))^2+14*(70+105/(1+2.5/x))
    lnsinx
    520+600/x=-0.04*(70+105/(1+2.9825/x))^2+14*(70+105/(1+2.9825/x))
    520+600/x=-0.04*(70+105/(1/1.193+2.5/x))^2+14*(70+105/(1/1.193+2.5/x))
    520+600/x=-0.04*(70+105/(1/1.193+2.5/x))^2+14*(70+105/(1/1.193+2.5/x))
    x^2-37x+242=0
    70+5x=175-12.5*x/1.193
    20x^2-341x+1449=0
    520+600/x=-0.04*(70+105/(1+2.5/x))^2+14*(70+105/(1+2.5/x))
    d（2d+3）+(d+1)(d+2)=0
    （10000-2400-2500-4000）/x+10000/（x+22.4）+10000/x+10000/x=150
    520+600/x=-0.04*(70+105/(1+2.5/x))^2+14*(70+105/(1+2.5/x))
    25.35+3.45x-19.72+1.19x=0
    2.155X+(1000/135)*(940-X)=2860
    2.155X+(1000/126)*(850-X)=2380
    V=1125.89+80.00+36.18+0.01V+51.48+0.0002V+77.61+0.0006V+0.0529V

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