1.

\left(\frac{x^{a}}{x^{b}}\right)^{a^{2}+a b+b^{2}}\left(\frac{x^{b}}{x^{c}}\right)^{b^{2}+b c+c^{2}}\left(\frac{x^{c}}{x^{a}}\right)^{c^{2}+a c+a^{2}}

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