The expression you've uploaded is:

$(-4) - (-1)$

To simplify this:

1. Recognize that subtracting a negative is the same as adding a positive. So the expression becomes:

$(-4) + 1$

2. Now, simply add $-4$ and $1$:

$-4 + 1 = -3$

Thus, the result is:

$-3$

Would you like more details or have any questions?

Here are five related questions for practice:

1. What is $(-7) - (-3)$?
2. How would you simplify $(-6) + (-8)$?
3. Solve $5 - (-2)$.
4. What is the result of $(-9) - (-5)$?
5. How do you compute $(-10) + 4$?

Tip: When subtracting a negative number, always remember that it turns into addition.