In the x column, begin at -2, increment by 1 and finish at 2 (41 rows).In the y column, use above formula, referencing appropriate x-value.?

I see two problems with your question.

First: "begin at -2, increment by 1, and finish at 2" yields 5 rows, not 41.

Second: "use above formula, referencing appropriate x-value" does not provide the formula nor does it indicate which x-value is appropriate.

Update your question as appropriate, and perhaps someone can help you. Otherwise, it's quite impossible to figure out what you are trying to do.

Yeah I need help with the actual excel sheet

You're not going to have 41 rows if you increment by 1.