Simplify. Please show all of your work

9c^3+7c-(3c^3-12+c)

Get rid of parenthesis.

9c^3+7c-3c^3+12-c

Combine like terms.

6c^3+6c+12

To simplify the given expression, we first need to combine like terms. Let's break it down step by step:

1. Distribute the negative sign inside the parentheses:
9c^3 + 7c - 3c^3 + 12 - c

2. Combine the like terms:
(9c^3 - 3c^3) + 7c - c + 12
(9 - 3) c^3 + (7 - 1) c + 12

3. Simplify the coefficients:
6c^3 + 6c + 12

So, the simplified form of the expression 9c^3 + 7c - (3c^3 - 12 + c) is 6c^3 + 6c + 12.