Replacing a=3, x=2, and y=1 into the expression, we get:
4(2) - 4(1) + 3(2) - 3(1) / (2)^2 - (1)^28 - 4 + 6 - 3 / 4 - 17 / 3
Therefore, the value of the expression when a=3, x=2, and y=1 is 7/3.
Replacing a=3, x=2, and y=1 into the expression, we get:
4(2) - 4(1) + 3(2) - 3(1) / (2)^2 - (1)^2
8 - 4 + 6 - 3 / 4 - 1
7 / 3
Therefore, the value of the expression when a=3, x=2, and y=1 is 7/3.