Which of the following expressions is equivalent to

1/2y²(6x+2y+12x-2y)

a) 9xy²
b) 18xy
c) 3xy²+12x
d) 9xy²-2y³
e) 3xy²+12x-y³-2y

First what I do is take separate x's and y's inside the ( ) then I like to put the x's and y's off to the side so then if you take 6+12 you get 18 but you have to multiply by 1/2 or divide by two and you get 9 that means that the answer is A because one of the y's is + the other is -

It equals 1373.5 that’s the solution