8.2+4.8＝
    456*(((1+(0.063/12))^(48-1)]/(0.063/12))*(1+(0.063/12))
    8.5-0.5＝
    1.5+2＝
    26.95*8.6+407.56*4.1-(26.98*（3.87+0.43)+156.66*(1.37+0.43)+(99.09*0.43+6.14*0.43*0.43)*(99.09*3+6.14*0.43)/(99.09*2+6.14*0.43)*0.43/3)
    157.5*(1+7.5%)*(1+10%)*15%
    tan1/9
    tan20
    632667.75/360=
    1×14.3×250×510×0.347=
    1－(1－2×0.287)^0.5=
    1000000×267.303/929857500=
    0.01×0.25×250×600=
    1×14.3×250×510×0.372=
    1－(1－2×0.303)^0.5=
    1000000×282.105/929857500=
    1×14.3×250×510×510=
    184858.96/360=
    1×14.3×2200×565×0.0104
    1－(1－2×0.0103)^0.5=

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