3(a+2b) + 6(a-b)3a+6b + 6a-6b3a+6a + 6b-6b9a + 09a-(5x-y) + 4(3x-y)-5x+y + 12x-4y-5x+12x + y-4y7x - 3y2(4x+y) - 7x8x+2y - 7x8x-7x + 2yx + 2y8a-5b - 3(a-4b)8a-5b - 3a+12b8a-3a - 5b+12b5a + 7b4(2x-y) - 2(x-y+1)8x-4y - 2x+2y-28x-2x - 4y+2y - 26x - 2y - 2