Is there a way in excel to evaluate the content of another cell in the same spreadsheet without any VBA or any other addon : I have a requirement where a cell , say A1 contains a formula , say SUM(B1:b5).

In A2 I want to execute content of A!. But when I put =(=A1) in A2 excel gives me formula error. Is there any wat I can execute content of A1 in A2 as formula
Mind you no VBA is allowed. Can someone please help?