Answer:
11a³-4a²-14a-7
Explanation:
(4a³ - 8a - 4a²) + (7a³-7-6a)
=4a³-8a-4a²+7a³-7-6a ( open brackets)
=11a³-14a-4a²-7
=11a³-4a²-14a-7
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