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