The expression $a^2 - (b + c)$ involves subtracting the sum of $b$ and $c$ from $a^2$.

It can be simplified as follows:

$a^2 - (b + c) = a^2 - b - c$

So, the parentheses can be removed, and you are left with:

$a^2 - b - c$

Let me know if you'd like further details or have any questions!

Here are 5 related questions:

1. How would you simplify $a^2 - (b - c)$?
2. What is the result of $(a^2 - b) + c$?
3. How does this expression change if $b = 0$?
4. What happens if you substitute specific values for $a$, $b$, and $c$?
5. How would you graph $a^2 - (b + c)$ if you know $b$ and $c$?

Tip: When simplifying expressions, always look for grouping symbols like parentheses. They help define the order of operations.