Lock and protect formulas in Excel

Hello Everyone,

I am working on a workbook that has many sheets with lot of formulas and I would like to know if there is a shorter way to lock and protect all the formulas in all sheets together. I know how to do it sheet by sheet but this is time consuming for me as I have many sheets.
If you know a shorter way, that would be great.

Thank you in advance,
Mamy
DRC

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Thank you for for help but apparently there is no way to select two or more sheets and protect all of them together. Will continue to do it one by one.

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