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## To simplify the expression 7a + [4a - 6b - (8a + 2b)], you need to perform the following steps:

1. Distribute the negative sign inside the parentheses:

7a + [4a - 6b - 8a - 2b]

2. Combine like terms:

(7a + 4a - 8a) + (-6b - 2b)

(3a) + (-8b)

Hence, the simplified expression is 3a - 8b.

So, to solve this expression, you distribute the negative sign inside the parentheses and then combine like terms.