f) (3a - 5b) – (6a - 7c) - (4c-8a) + (2a + 3b – 4c)
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Explanation:
(3a-5b)-(6a-7c)-(4c-8a)+(2a+3b-4c)
=3a-5b-6a+7c-4c+8a+2a+3b-4c
=3a-6a+8a+2a-5b+3b+7c-4c-4c
=13a-6a-2b-c
7a-2b-c
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