Calculating and Pasting the Result of a Formula in a Text Document
If your text already contains a formula, for example "12+24*2", LibreOffice can calculate, and then paste the result of the formula in your document, without using the \<emph\>Formula Bar\</emph\>.

Select the formula in the text. The formula can only contain numbers and operators and cannot contain spaces.

Choose Tools  Calculate, or press Command Ctrl+Plus Sign (+).

Place the cursor where you want to insert the result of the formula, and then choose Command Ctrl+V.
, or press
The selected formula is replaced by the result.