Data:6 2/Kauffman Polynomial

$z^2 a^6+2 z^3 a^5-z a^5+2 z^4 a^4-2 z^2 a^4+a^4+z^5 a^3-z a^3+3 z^4 a^2-6 z^2 a^2+2 a^2+z^5 a-2 z^3 a+z^4-3 z^2+2$