https://chromewebstore.google.com/detail/math-keys-equation-formul/imcaiokpoocfeplmgemffhmdokiaallo
Free online equation editor that utilises LaTeX to allow users to write mathematical equations, formulas, and symbols online
chrome web storeformula editormathkeysequation
https://chromewebstore.google.com/detail/better-formula-editor-for/lonibgccfehnjjhchfcbdhkaajhobeak
This extension enhances Anaplan formula editing in several ways; providing code completion, hover info and validity checks.
chrome web storeformula editorbetteranaplan