Answer:
-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
