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[f(12)" verify that "x^(3)+y^(3)+z^(3)-3...

[f_(12)" verify that "x^(3)+y^(3)+z^(3)-3xyz^(3)-2^(2)],[y_(13)^(12)" .If "x+y+z=0," show that "x^(3)+y^(3)+z^(3)=3xyz]

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