2876.59=150*0.45*0.45/0.55/0.55/0.55*0.0000184*x/0.0025/0.0025+1.75*0.45/0.55/0.55/0.55*1.185*x*x/0.0025
    a^2+6a =18
    16x²-96x+9=0
    20*(1+2t)*(1-0.3t)+8*(1+6t)*(1-0.25t)=[20*(1+2t)+8*(1+6t)]*(1-5/18t)
    y＝lg1
    x^3-0.12x-1.2=0
    （X-12%）/2%=0.73
    X-12%/2%=0.73
    e^x=x-2
    x^0.32=17
    x^0.32=17
    x^0.32=17
    x^0.32=6.6
    X^(-0.074)=0.748
    X^(-0.074)=0.748
    X^(-0.074)=0.748
    X^(-0.074)=0.748
    x^0.32=6.6
    V=602.45+0.879503V
    1/3*(100^3)+x/2*10000-30000x-0.44=0

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