-6*10^（-6）x^2+0.008x+1.3321=1.3342
    x+5（x/10）=54
    x+5x/10=54
    0.365sinx-x+1.664=0
    2x^3+x+2=0
    0.387sinx-x+1.605=0
    0.277=((x*x*0.0027)/(x*x*0.0027+0.0164))/x
    0.277=(（x^2*0.054*0.054）/(x^2*0.054*0.054+0.128*0.128))/x
    x*x=20
    1-a/(1.66+a)+1/6.283sin(6.283a/(1.66+a)) = 1/(2*2.020)
    1-a/(1.66+a)+1/6.283sin(6.283a/(1.66+a)) = 1/(2*2.020213)
    1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*2.020213)
    0.412sinx-x+1.538=0
    1-a/(1.66+a)+1/6.28sin(6.28a/(1.66+a)) = 1/(2*2.275745)
    1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*2.275745)
    1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*2.523007)
    0.664sinx-x+0.881=0
    (0.01x + 220)*75=x
    (0.01x + 220)*45=x
    x-0.12x=17500

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