4(yplus7) 8(x plus 2) and a whole lot more
4 ( y + 7) = 4y + 28 ...... 8(x + 2) = 8x + 16
If you want to multiply these, we have
(4y + 28) (8x + 16) = 32xy + 64y + 224x + 448
and a whole lot more
