X+X*2%=2239899.08
    3.5502-1.0897*x=2.1801-0.2414*x
    4.4798-1.6535*x=2.4575-0.3112*x
    5.2364-2.0132*x=3.1515-0.5583*x
    5.0230-1.9767*x=1.6514-0.0496*x
    4.7347-2.2875*x=1.7130-0.2428*x
    2(5+x+19.2+33.1)=50+212-2x
    2(5+x+19.2)=50+212-2x+51.1
    2(5+x+19.2)=50+212-2x
    2(5+x+19.2)=50+212-2x+62.2
    2(5+x)=50+212-2x
    2(5+x)=50+88.2+212-2x
    2(5+x+22)=70+212-2x
    2(5+x+12)=50+212-2x
    0.5*（1-0.5^n）/0.5＝1
    2(5+x)=50+212-2x
    2(5+x)=50+212-2x
    tana0.14
    tana0.14
    （8301.5+10.35+65+X）*3.5%*1/4=X

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