A×6×0.5×3A×0.5=9
    5.2105=25.5755*0.8962(5.2105+0.1)/1.8962(x+0.1)(100-10.81-1.96)/100*1/(1+0.31*1.96)+2.07(x+0.1)/1.4*0.101325
    5.2105=[25.5755*0.8962(5.2105+0.1)]/[1.8962(x+0.1)](100-10.81-1.96)/100*1/(1+0.31*1.96)+[2.07(x+0.1)]/(1.4*0.101325)
    25.5755*0.8962(5.2105+0.1)/1.8962(x+0.1)(100-10.81-1.96)/100*1/(1+0.31*1.96)+2.07(x+0.1)/1.4*0.101325
    4.2954=（（30.56*0.847（x+0.1））/（1+0.847（x+0.1））*（（100-8.28-1.4）/100）*（1/(1+0.31*1.4）+（（2.26（x+0.1））/（1.3*0.101325））
    2*x^3-3*x^2+12=0
    2*x^3-3*x2+12=0
    sinx/ex
    -2x²+2
    1200x=1500+800x
    300*x=280+（159+1）*x
    x^2-9.3x+20.1=0
    200x2-2.5x+48.75=0
    x²-x=-1
    a+a*2=9
    x^π＝1
    x*1.2*0.95=207
    x*1.2x*0.95x=207
    12.13c=（3.5+c）×7.97
    12.13c=（3.5+c）×7.98

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