Casio fx-9750GII Notes: Bump Function and Referencing Functions

The "bump" function is well known, useful for approximating the unit impulse:

To do this piecewise function on my Casio calculator, you must use conditionals, which evaluate to 1 or 0:

Y1=e^(-1÷(1-X²))×(X>-1 And X<1)

I was wondering also how to reference a previously defined function in the Graph equation list. You must use the special bold Y symbol available by pressing F1 while inputting the equation. Here is an example, although the menu is not showing in this picture:

Using this feature, here is the bump function shifted up 1 unit: