User talk:177.32.122.189

Recent edit to Del in cylindrical and spherical coordinates
In cases of mathematics, chemistry and physics etc. The term formulae is used. Thank you! ★ AɾყαɳTԋҽAɾƚιƈʅҽAɾƚιʂƚ ★  ✉  07:34, 16 March 2019 (UTC)