Find the difference (-7ab-7a-4) - (-5ab-1)

-2ab - 7a - 3

Step-by-step explanation:

First you need to distribute the negative through the second set of parenthesis - (-5ab-1) will result in + 5ab + 1.

Next we combine the like terms:

(-7ab - 7a - 4) + 5ab + 1

-7ab + 5ab and - 7a and - 4 + 1