2 x*(x+y)*(x^2+x+y^2)*(x^2+x+y+1)*(x^2+x+y^2+1)*(x^3+x+y^3)*(x^3+x+y+1)*(x^3+x+y^3+1)*(x^3+x+y^3+y+1)*(x^3+x+y^3+y^2+1); x^2+x+1; x^3+x+1; x^4+x+1; #