The expression $-2 - (-4)$ can be simplified by removing the parentheses and turning the double negative into a positive:

$-2 - (-4) = -2 + 4 = 2$

So, $-2 - (-4) = 2$.

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Here are 5 related questions to expand your understanding:

1. What is the result of $-5 - (-7)$?
2. How do you simplify $-8 - (-3)$?
3. What happens when you subtract a negative number from a positive one?
4. How do you solve expressions involving double negatives?
5. What is the result of $-10 - (-10)$?

Tip: Subtracting a negative number is the same as adding the positive version of that number.