27(x^3 y^2 z^2 + x^2 y^3 z^2 + x^2 y^3 z^3 ) ÷ 45 x^2 y^2 z^2
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2(x+y+z)
8(x ³y²z²+x²y³z²+x²y²z³)÷4x²y²z²
=8(x³y²z²+z²y³z²+x²y²z³)
___________________
4x²y²z²
=8×x²y²z²(x+y+z)
_____________. =2(x+y+z)
4x²y²z²
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