(x - 8)*(6 - y)
(x - 1*8)*(6 - y)
-(-8 + x)*(-6 + y)
1*(x - 8)*(y - 6)
(1*(x - 8))*(y - 6)
-48 + 6*x + 8*y - x*y
(6.0 - y)*(-8.0 + x)