I'll provide a simple example of what I'd like to do:

I have some formulae in cells E1 and F1 and I'd like to copy and paste them to cell E2 to F2 AFTER data has been pasted in the preceding columns (A:D) until the end of the range of the data in columns A to D.

The data in columns A to D could go from row 2 to row 100, or from row 2 to row 1000.

Does anyone know how to do this, please?

I've pasted very simple formulae below, to save you time:

This formula should go in cell E1: =A1+B1

This formula should go in cell F1: ==C1+D1

Thanks in advance!