$$\left. \begin{array} { l } { x + y + z = 0 x ^ { 3 } + y ^ { 3 } + z ^ { 3 } [ 34 c t ) 3 z ( 1 ) ? } \\ { 0 } \end{array} \right.$$
$x=y^{3}-y+z^{3}-z$
$$x+y+z=0+y^{3}+z^{3}$$
$$x+y+z=y^{3}+z^{3}$$
$$x+z=y^{3}+z^{3}-y$$
$$x=y^{3}+z^{3}-y-z$$
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