Of course you\'re going to answer this question with the =\"\" formula to be written in the aforementioned cell, but this is not my case.
=\"\"
Actually, I ha
Bad news: you can't. Once a cell contains a formula it is never in a truly blank state.
E.g. set a cell to =A1, and you see that a 0 will appear in that cell; even when A1 is itself blank.