K=2606.5+104.26+0.01K+60.86+0.0002K+692.91+0.0026K+0.0529K
    K=2606.5+104.26+0.01K+60.86+0.0002K+914.63+0.0034K+0.0529K
    （y-154.96）/154.96*100-（-6.81）=（y-144.41）/144.41*100
    （y-91.51）/91.51*100-（-12.60）=（y-79.98）/79.98*100
    （y-91.51）/91.51*100-（-12.6）=（y-79.98）/79.98*100
    （y-217.30）/217.30*100-（-4.5）=（y-207.53）/207.53*100
    (y-64.49)/64.49*100-(-9.06)=(y-58.65)/58.65*100
    V=496.06+110.00+24.24+0.01V+24.47+0.0002V+98.22+0.0015V+0.0529V
    (y-31.99)/31.99*100-(-2.66)=(y-31.14)/31.14*100
    (195+306)/30*x+150/30*(x+15)+120/30(x+30)=1255
    (y-46.57)/46.57*100-(2.13)=(y-47.56)/47.56*100
    x^2+8x+sqrt(x^2+8x)=12
    20=40log400x
    20=40log（400y/720）+1.2
    20=40log（400x/720）+1.2
    20=40log（400x/720）
    (x-38.79)*x=0.3424
    6000=A-(A*2%)-((A-800-A*2%)*10%）
    1400*130*（x-130/2）+200*x^2=6.6667*6182（1480-x）
    800x^2=6.6667*6182（1480-x）

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