x=68.1733333333333+5.96516666666667+6.8948805+1+8*1200/1038+(x/1.05*5%)*1.12+x/1.05*12%
    x=68.1733333333333+5.96516666666667+6.8948805+1+8*1200/1038+(x/1.09*9%)*1.12+x/1.09*12%
    x=27.1102863202545+2.68012290562036+2.77050805800636+1+8*1200/1038+(x/1.09*9%)*1.12+x/1.09*12%
    xx+x=32
    （2200-x）/x=-0.77
    x^3-x-9/4=0
    x=1/（1+0.01）
    120（1+x）（1+x）=570
    90*（3-x）=45*(5-x)
    lg(3/4)=x
    -0.08=lgx
    lg1=x
    lg2=x
    3x^2-48x+144
    x*lnx＝1.203*10^44
    x^3-2*x-5=0
    x+(x*0.03)=85000
    3/4x²+9/4 x-3=0
    x=20÷1.08+21.5÷1.08^2+23÷1.08^3+24.5÷1.08^4+(1+5%)^4x×0.94÷1.08^4
    x=20÷1.08+21.5÷1.08^2+23÷1.08^3+24.5÷1.08^4+1.2x×0.94÷1.08^4

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