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What is the second factor in the decomposition of \(z^4 - 1\) by \((z - 1)\)?
\((z - 1)(z^3 + z^2 + z)\)
\((z - 1)(z^3 + z^2 + z + 1)\)
\((z - 1)(z^4 + z^3 + z^2 + z + 1)\)
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