1. Problem: Evaluate the expression $ (+5) + (+7) + (+12) $ from left to right. 2. Use the rule for addition of integers: add the numbers stepwise. 3. Calculate $ (+5) + (+7) = +12 $. 4. Then add $ +12 + (+12) = +24 $. 5. Final answer: $ +24 $. This method applies similarly to other expressions by evaluating two integers at a time from left to right.