(4.2*10^-6-x)*(5.5*10^-5-x)=1.8*10^-10
    182750+（1.0%X+126250）+5.4%X=X
    109650+（1.0%X+15750）+5.4%X=X
    160820+（1.0%X+23100）+5.4%X=X
    182750+（1.0%X+27500）+5.4%X=X
    2xx+7x+6=0
    158250+（2.0%X+27500）+5.4%X=X
    182750+（2.0%X+27500）+5.4%X=X
    2%X+25000+2500=2%X+27500
    2%X+25000+2500=2%X+42500
    150%x*60+150%x*50%*40-100x=4000
    182750+（2.0%X+425000）+5.4%X=X
    5.3%X+0.1%X=5.4%X
    5.3%X+0.1%X=16.4%X
    182750+（2.0%X+425000）+16.4%X=X
    160.7+45.3+142.8+（2.0%X+46.1）+16.4%X=X
    160.7+45.3+145+（2.0%X+46.1）+16.4%X=X
    394.9+18.4%X
    160.7+45.3+145+（2.0%X+46.1）+16.4%X
    sinx-sin1*x-2=0

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