-2

I want to know if the union of the equations A to E covers N fully for sufficiently large X and Y running over non-negative integers
A = 10XY + X + Y (non-zero X and Y)
B = 10XY + 9X + 9Y + 8
C = 10XY + 7X + 3Y + 2
D = 10XY + X + 3Y (non-zero Y)
E = 10XY + 9X + 7Y + 6
we know neither unio...