Equivalent Expression without Parentheses

Thank for taking your time helping me. Here is the question:

Find an equivalent expression without parentheses for each of the expressions:

. . .a. 5(A + 7)
. . .b. 8(Y - 4)
. . .c. 2(W + 6)

I feel pretty dumb right now, because this should be easy. But I can't seem to get it through my head. Please show me how to do this. I'm not asking for the answers; if you could just show me a similar example that I can study, that would be great.

Thank you!

Just take the multipliers through the parentheses. For instance:

. . . . .4(3x + 5) = 4(3x) + 4(+5) = 12x + 20

. . . . .4(3x - 5) = 4(3x) + 4(-5) = 12x - 20

. . . . .4(-3x + 5) = 4(-3x) + 4(+5) = -12x + 20

. . . . .-4(3x + 5) = -4(3x) - 4(+5) = -12x - 20

. . . . .-4(3x - 5) = -4(3x) - 4(-5) = -12x + 20

And so forth.

Eliz.