Here is a tutorial to lock or hide only the formula cells in an Excel workbook. You can also lock formulas in all worksheets in a workbook.

You can hide formulas in Excel while working. All the formulas and the calculation work can be hidden from the viewers. Learn how to do it.

You can easily hide and unhide columns in Excel by individually revealing hidden columns or using the "Format" option to unhide all hidden cells.

On the other hand, to select non-sequential rows and columns to hide, press Ctrl as you click on the row numbers or column letters. How to Completely Hide an Excel Worksheet ...