Let's simplify the given expression:

$(2x - 3) - (2x + 3)$

1. Distribute the negative sign across the second set of parentheses:

$= (2x - 3) - 2x - 3$

2. Now combine like terms:

$2x - 2x - 3 - 3 = -6$

So, the simplified expression is:

$\boxed{-6}$

Would you like more details, or have any further questions?

Here are five related questions:

1. What would be the result of $(3x - 5) - (3x + 7)$?
2. How do we simplify $(5x + 2) - (3x - 4)$?
3. What is the difference between $(4x + 6) - (2x + 3)$?
4. How can we combine terms in expressions like $(2x - 1) + (3x + 2)$?
5. How do you factor expressions like $(2x - 3)$ and $(2x + 3)$?

Tip: Always distribute the negative sign when subtracting expressions enclosed in parentheses.