Answer
$$x^{2}y^{2} - 14xy + 49$$
Work Step by Step
The first thing we want to do with this problem is to expand the expression so that we can see the terms clearly:
$$(xy - 7)(xy - 7)$$
We use the FOIL method to evaluate this expression. We multiply each term within the first set of parentheses with each term in the second set of parentheses:
$$x^{2}y^{2} - 7xy - 7xy + 49$$
Now, we combine like terms:
$$x^{2}y^{2} - 14xy + 49$$
