Ответ:
x³+xy(x+y)+y³+yz(y+z)+z³+zx(z+x)=x³+x²y+xy²+y³+y²z+yz²+z³+z²x+zx²
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Ответ:
x³+xy(x+y)+y³+yz(y+z)+z³+zx(z+x)=x³+x²y+xy²+y³+y²z+yz²+z³+z²x+zx²