Mathematics of Poker - trying to solve a problem

[Beavis68]

I am trying to use the variance and normal distribution equations on page 23 and 24 to come up with a normal distribution on being dealt aces (or any specific pair) over x number of hands.

I am trying first to figure out the variance for a single deal using the normal distribution example on page 24.

This is what I come up with:

Vaces = 1/221*(1-1/221)^2+220/221*(0-1/221)^2

I dont know how to insert the special symbols for the generic equation they use.