06*（1+G)/12+G＝0.11
    89.64*ln(100/x-33.08)+x=133.08
    ln(1/x)+x=5
    -1.092=（1/x）*ln（1-x）
    sinx+8.583-4.279x=0
    sinx+8.011-4.06x=0
    0.69x∧2 － 7071x + 1.75 ＝0
    tg(arccos0.67)
    tg(arccos0.67)
    x^2/(√3*x+1-√7)^2=x^2+(√3*x+1)^2
     x²+x = 68
     x²+x = 68
    x^2/(√3*x+1-√7)^2=x^2+(√3*x+1)^2
     x²+x = 68
    0.276sinx-x+1.894=0
    sinx+6.491-3.478x=0
    （398*1.2+1200）*20/1.3*1.85x+（398*1.7+1200 ）*2.2*20/1.3*1.85x=450000
    （398*1.7+1200 ）*2.2*20/1.3*1.85*x=450000
    x(x+1)=33550336*2
    x/（30+x）=2/5

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