Answer:
16a^3b^2c - 8a^4b^3c^2 - 4a^2b^2c
Explanation:
(8a^bc × 2ab) - (4a^3b^2c^2 × 2ab) - (2abc × 2ab)
(16a^3b^2c) - (8a^4b^3c^2) - (4a^2b^2c)
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