x^3*y^3

1

-27*a^3*y^3

1

-27*a^3*y^3

1

x^3*y^3

-3

9*x^2*a^2*y^2

-2

81*a^4*x*y

1

9*x^2*a^2*y^2

1

x^3*y^3

1

9*x^2*a^2*y^2

1

x^3*y^3

1