Test

Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \begin{equation} F_3(\Pi, \Xi) = \frac{2 P_3(\Pi, \Xi) R_3(\Pi, \Xi)}{P_3(\Pi, \Xi) + R_3(\Pi, \Xi)}, \end{equation} }