1. CTRL+A to select entire Sheet or select top left corner between row 1 and column A.
2. Right Click > Format Cells > Protection = Click Locked Check box to remove tick mark from Locked to make all cells unlocked.
3. CTRL + G and click on Special.
4. Click on Formulas and OK
5. It will highlight all the cells which contain formulas. Right Click one of the highlighted cell > Format Cells > Protection = Click Check box to tick mark Locked to make all selected cells locked.
6. Now protect the sheet from Review tab.