Simplify the expression to a + bi form:

To simplify the expression \((11 + 2i) + (7 + 5i)\), you can combine the real parts and the imaginary parts separately.

1. Combine the real parts: \(11 + 7 = 18\)
2. Combine the imaginary parts: \(2i + 5i = 7i\)

Putting it all together, you get:

\[ 18 + 7i \]

Thus, the simplified expression in \( a + bi \) form is:

\[ \boxed{18 + 7i} \]