-12 + (-6) + 15 + (-2)

I did the last one for you. Now it's your turn.

I'll be glad to check your answer.

Right.

To solve the expression -12 + (-6) + 15 + (-2), you can follow these steps:

Step 1: Combine similar terms within parentheses.
-12 + (-6) can be simplified by adding the numbers inside the parentheses together:
-12 + (-6) = -18

Step 2: Rewrite the expression with the simplified terms.
So now the expression becomes -18 + 15 + (-2).

Step 3: Combine all the terms without parentheses together.
-18 + 15 + (-2) can be simplified by adding the numbers together:
-18 + 15 + (-2) = -5 + (-2) = -7

Step 4: Simplify the expression further.
Therefore, the final answer is -7.