Describes the cause and action for error messages.
Error Message(English)：
why excel is not taking formula
Excel formulas not working: how to fix formulas not updating or not ...
https://www.ablebits.com/office-addins-blog/2016/02/03/excel-formulas-not-working/
5 Reasons Why your Excel Formula is Not Calculating - YouTube
https://www.youtube.com/watch?v=AvR1EtjToLk
https://www.youtube.com/watch?v=AvR1EtjToLk
Why Is Your Excel Formula Not Calculating? | Pryor Learning Solutions
https://www.pryor.com/blog/why-is-your-excel-formula-not-calculating/
Excel shows formula but not result | Exceljet
https://exceljet.net/excel-shows-formula-not-result
How to use the Excel NOT function | Exceljet
https://exceljet.net/excel-functions/excel-not-function
Excel Formula Does Not Calculate | Dedicated Excel
http://dedicatedexcel.com/excel-formula-does-not-calculate/
Excel display formula rather than result
http://users.wfu.edu/matthews/misc/Excel/FormulaDisplayBug.html
Excel formula showing as text? 3 things you should check to fix the ...
https://chandoo.org/wp/excel-formulas-are-not-working/