To subtract the expressions, we can follow these steps:
- Distribute the negative signs inside each set of parentheses.
- Combine like terms.
Starting with the expression:
\[ (3b - 2c) - (6c + 2b) - (b + c) \]
First, distribute the negative signs:
\[ 3b - 2c - 6c - 2b - b - c \]
Now, combine like terms. First, combine the \(b\) terms:
\[ 3b - 2b - b = (3 - 2 - 1)b = 0b = 0 \]
Now, combine the \(c\) terms:
\[ -2c - 6c - c = (-2 - 6 - 1)c = -9c \]
Now, putting it all together, we have:
\[ 0 - 9c = -9c \]
Thus, the final result is:
\[ \boxed{-9c} \]