Math Flash

Need an actionscripters help with flash math functions pow and sqrt!?

I need help with adding 2 functions in my flash calculator, raising x to the y power and finding the square root of x with actionscripting! I am not doing complicated coding just that in my frame i add :

set(x,'')
set(y,'')
set(total,'')

which means x and y are my two variables and total is the amount that comes from x and y when they are raised to the power, and in the sqare root case, it would be total = square root of x. like in the subtraction button i coded it like this:

on(press){ total=x-y }

so how do i integrate this to squaring integers and finding the square root of a number? Please dont say go to flashkit cause they have too much complicated coding and the official flash website doesn't help too much. all i know is that to raise x to the y power i use the function pow and for square root i use
sqrt....

so please can u tell me how to do it in this format?

REMEMBER: I WILL PICK BEST ANSWER IF I GET WHAT I AM LOOKING FOR!!!!

Power:
on(press){ total = Math.pow(x,y); }

Sqrt:
on(press){ total = Math.sqrt(x); }

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