to expand brackets, you take what is outside the brackets and multiply everything that is inside.

example: -2(x + 3) - 4

expand the brackets first. we take -2 and multiply everything in the brackets, so we get:

-2x - 6 - 4

now we simplify

-2x - 10

and we're done.

so you would write:

-2(x + 3) - 4 = -2x - 6 - 4

..................= -2x - 10

now do all your problems like that