Given the expression:

1. You need to substitute these values given in the exercise into the expression:

Then:

2. According to the Sign Rules for Multiplication:

Knowing this, you can solve the multiplication in the numerator and simplify the denominator:


You know that:

Then:

3. According to the Sign Rules for Division:

Therefore, since the numerator is negative and the denominator is positive, the fraction is negative:

4. You can reduce the fraction by dividing the numerator and the denominator by 4:

Hence, the answer is:
