(-12) -(-17) / (-23)) - (-23)

To solve this expression, let's break it down step-by-step:

Step 1: Evaluate the expression inside the first set of parentheses:
(-12) - (-17)
To simplify this, remember that subtracting a negative number is the same as adding a positive number. Therefore, we can rewrite the expression as:
(-12) + 17 = 5

Step 2: Evaluate the expression inside the second set of parentheses:
(-5) - (-23)
Again, subtracting a negative number is the same as adding a positive number, so we can rewrite the expression as:
(-5) + 23 = 18

Step 3: Divide the result from Step 1 by the result from Step 2:
5 / 18

And that's the final answer: 5 divided by 18.