How to interpret a formula stored in a transparent table

Dear all,
I have filled in a specific transparent table with some formula. I would like to read the table, find the formula and take the result of this formula in a variable
In my table :
Country, formula 1, formula 2
FR, P + 1 ( 1 / 80 ), R * 1 ( 1 - 30 )
In my program,
I read the table with the country as key, and I would like, first to replace the P and R by a value in the program, and I would like to interpret the formula and put the result of this in a variable
if Country = FR
replace P by w_price in formula1
replace R by w_tva in formula2
w_result1 = formula1
w_result2 = formula2
I don't know how to do interpret these 2 statement like :
w_result1 = w_price + 11 ( 1 / 80 )
w_result2 = w_tva * 1 ( 1 - 30 )
I tought to use the field symbol and assign but w/o success for the moment
Can anybody help me ? it is very important.
Thanks
Kind regards
Véronique

Hello,
I think my questions was not so clear.
In fact, the formula is in a field in a transparent table
for example : my_table has a field my_formula. In this field I have written: P + 1 ( 1 / 80 )
I need to interpret the content of the field my_formula to solve the formula and put the result in a variable.
I don't want to write the formula directly in the program
thanks
Véronique

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