Possible to Insert Actual Excel Formula in Power Query?

Is it possible to insert an actual Excel formula with Table.AddColumn() in Power Query?

I want to generate a new table (Table B) with 3 columns, to show correlations between the columns in Table A. For example:

Table B

Fig: Table B.

I want the rows in the "coefficient" column to have the Excel formula =CORREL(INDIRECT("TableA[" & A2 & "]"), INDIRECT("TableA[" & B2 & "]")). I need to do this because some column rows in Table A are empty and I can't find a way to calculate correlations in M or DAX when there are empty rows.