develop
Fix #21882: Return 400 for invalid algebraic answers (#25322)
Fix #15802 and #26813: Preserve SVG text line breaks and prevent vertical toolbar overlap (#26785)
Separate exploration data files from other extensions.
Fix part of #25997: Replace core-js/es7/reflect with reflect-metadata and consolidate to single import location (#26475)
Fix #14085: Deprecate math interactions' unsupported rules and update cust arg name. (#15271)
Apply prettier 2 (#19862)