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Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "http://localhost:6011/en.wikipedia.org/v1/":): {\displaystyle \frac{1,2}} Failed to parse (syntax error): {\displaystyle z(u) = r \sqrt{2} [(E(u,\frac{1}{sqrt2})-\frac{1}{2}F(u, \frac{1}{sqrt2}}]}