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![(4a - 2b - 2c) {}^{2} (4a - 2b - 2c) {}^{2}](https://tex.z-dn.net/?f=%284a+-+2b+-+2c%29+++%7B%7D%5E%7B2%7D+)
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Answer:
16a^2 + 4b^2 +4c^2 -16ab +8bc - 16ca
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