Simplify the numerator.

Combine the like terms in the numerator:

$$2x^2y^2 + 5x^2y^2 = (2+5)x^2y^2 = 7x^2y^2$$

Distribute the negative sign inside the parentheses:

$$1-(1-x^2y^2) = 1 - 1 + x^2y^2$$ $$= x^2y^2$$

$$\frac{7x^2y^2}{x^2y^2}$$

Assuming $x \neq 0$ and $y \neq 0$, the $x^2y^2$ terms cancel out:

$$= 7$$

The simplified expression is 7.