Data:L10a47/Multivariable Alexander

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 v u^3+3 u^3+4 v u^2-4 u^2-4 v u+4 u+3 v-2}