You should follow the order of operations to solve 7x(-2+3)+(-5-2)
First, we solve the problems that is inside the parenthesis
7x(-2+3)+(-5-2)=
7x(1)+(-7)=
7x1-7
Then we do the multiplication problem
7x1-7=
7-7=0
We finally do the remaining problem
The answer to your problem is 0
I hope this helps