To solve the expression [tex]\(4 + (5 + 12)\)[/tex], we need to follow the order of operations, which is parentheses first.
1. Start by calculating the sum inside the parentheses:
[tex]\[
5 + 12 = 17
\][/tex]
2. Now, add the result to 4:
[tex]\[
4 + 17 = 21
\][/tex]
The correct answer is:
[tex]\[
\boxed{21}
\][/tex]
