Let's break this down step by step:

The original expression is:

$(-18) - (23) - (-12) + (-6)$

1. First, simplify each term:
   • $(-18)$ stays the same.
   • $(-23)$ stays the same.
   • $-(-12)$ turns into $+12$ (since subtracting a negative is like adding).
   • $(+(-6))$ stays as $-6$.

So, the expression now looks like this:

$-18 - 23 + 12 - 6$

2. Now, perform the operations from left to right:
   • $-18 - 23 = -41$
   • $-41 + 12 = -29$
   • $-29 - 6 = -35$

Thus, the result is:

$\boxed{-35}$

Would you like more details on any of these steps or have any further questions?

Here are some related questions you can try:

1. $(-15) - (27) - (-10) + (-4)$
2. $45 - (-30) - 12 + (-8)$
3. $(-10) - 5 + (-20) + 7$
4. $(-22) - (-13) + (-15) - 9$
5. $60 + (-50) - 25 + (-5)$

Tip: Remember, subtracting a negative number is the same as adding its positive value.