Data:10 90/Alexander 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 -2 t^3+8 t^2-17 t+23-17 t^{-1} +8 t^{-2} -2 t^{-3} }