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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 "https://wikimedia.org/api/rest_v1/":): {\displaystyle WPOP=\sum^RPOP_r}
<math>WPOPR+\frac{\sum^RPOP_r*POPR_r}{WPOP}