Formulas can be deleted, edited and also copied via the cogwheel on the right side.
A special feature of the editing is the modification. Here x and the outer ( ) brackets are converted into the * for multiplication and the [ ] brackets needed by the formula calculator.
When copying, one can distinguish between the original formula and the replaced and, if necessary, calculated (intermediate) result.
Formulas in which individual variables are still missing can be inserted into the Variable Coordinate tool to interpolate the missing values and search for valid coordinates on the map.