VBA code for Add multiple Column cell Value in New Column Cell

I have read many questions and sometimes I am really surprised at the questions people can ask and why but you will have your own reasons for that
If you want to see that then you will have to use vba to actually see the numbers which you will have to copy one by one.
instead of

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but then you still don't see the values only the cells similar as the SUM, so my guess is to write a macro that places the three values in the cell.
You can do it simply by recording it or worksheet_Change event for that column to place the values in the new column

Then what you are really doing is entering the the same value again, I honestly do not understand why you would want that.
And since you're asking, do YOU have any VBA knowledge and know how to work with macros?
It will be useless f you cannot modify it yourself

Modify a value in column B, C or D

Hope you understand it and can use it

I don't know which formula you run with Alf+F8 but you can add the syntax in the macro and you've got it

Then I will need to know where you want the answer and the exact calculation you require
You already have two macros in the VBA folders but they are very much incorrect