Data:8 20/Kauffman Polynomial

Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle a^4 z^6+a^2 z^6+a^5 z^5+2 a^3 z^5+a z^5-4 a^4 z^4-4 a^2 z^4-4 a^5 z^3-7 a^3 z^3-3 a z^3+4 a^4 z^2+6 a^2 z^2+2 z^2+3 a^5 z+5 a^3 z+3 a z+z a^{-1} -2 a^4-4 a^2-1}