Data:10 10/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} +z^4 a^{-4} +z^4-a^2 z^2+2 z^2 a^{-4} -z^2 a^{-6} +z^2- a^{-2} +2 a^{-4} - a^{-6} +1}