=SUMPRODUCT(LARGE(A1:A6,{1,2,3})^2)

"Denise" wrote:

I have a form that has six areas where a number of 1 - 6 will be entered.

I need a formula that will square the 3 highest numbers and and add the
three together -

Example -
1
2
4
4
5

The numbers 4 and 5 will be squared and added together for a total of 57