Data:9 39/HOMFLYPT 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 -z^4 a^{-2} -2 z^4 a^{-4} +z^2 a^{-2} -3 z^2 a^{-4} +3 z^2 a^{-6} +z^2+2 a^{-2} -2 a^{-4} +2 a^{-6} - a^{-8} }