Data:K12a1025/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^4+12 t^3-31 t^2+52 t-61+52 t^{-1} -31 t^{-2} +12 t^{-3} -2 t^{-4} }