1123-(456+345)

To solve the expression \( 1123 - (456 + 345) \), we first need to calculate the value inside the parentheses:

\[ 456 + 345 = 801 \]

Now, we can substitute that back into the original expression:

\[ 1123 - 801 \]

Finally, subtract:

\[ 1123 - 801 = 322 \]

Thus, the result of the expression \( 1123 - (456 + 345) \) is \( 322 \).