Extension:Math/Popups
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Failed to parse (Conversion error. Server ("https://wikimedia.org/api/rest_") reported: "Class "Wikibase\Client\WikibaseClient" not found"): {\textstyle E=mc^{2}}
Failed to parse (Conversion error. Server ("https://wikimedia.org/api/rest_") reported: "Class "Wikibase\Client\WikibaseClient" not found"): {\displaystyle E=mc^{2}}