Data:5 2/Kauffman Polynomial

[math]\displaystyle{ a^7 z^3-2 a^7 z+a^6 z^4-2 a^6 z^2+a^6+2 a^5 z^3-2 a^5 z+a^4 z^4-a^4 z^2+a^4+a^3 z^3+a^2 z^2-a^2 }[/math]