\( \begin{array}{c}\left(b^{2} c+c^{2} a+a^{2} b-3 a b c\right)\left(b c^{2}+a^{2}+a b^{2}+3 a b...
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0\( \begin{array}{c}\left(b^{2} c+c^{2} a+a^{2} b-3 a b c\right)\left(b c^{2}+a^{2}+a b^{2}+3 a b c\right) \\ =(b c+a a+a b)^{3}+27 a^{2} b^{2} c^{2}\end{array} \)
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