Hi,
Answer: 1,663
My work: This problem can be easily achieved by taking the numbers 735 and 688 and adding them up to the answer of 1,423. You would do these numbers first because they are in parentheses, and any number in parenthese is to be done first! After finished with this you would take 1,423 and add it with 240 to get the answer of 1,663.
I Hope this helps!