Let's break down the expression provided in the image:

$\frac{x^2 x^2 y}{y^{-4}}$

Step-by-step simplification:

1. Combine like terms:

   • For the $x$ terms: $x^2 \cdot x^2 = x^{2+2} = x^4$.
   • The numerator becomes: $x^4 y$.

2. Simplify the $y$ terms:

   • In the denominator, you have $y^{-4}$.
   • Using the property of exponents $\frac{y}{y^{-4}} = y^{1 - (-4)} = y^5$.

Thus, the simplified expression is:

$x^4 y^5$

Now, let's compare it with the options given. The correct equivalent expression is:

$x^4 y^5$

So the correct answer is the last option: $x^4 y^5$.

Would you like further details or clarifications?

Here are five related questions to consider:

1. How do you simplify expressions with negative exponents?
2. What are the rules for multiplying variables with exponents?
3. How do you simplify a fraction with terms in the numerator and denominator?
4. Can you explain the property of exponents $\frac{a^m}{a^n} = a^{m-n}$?
5. What happens when you raise a variable to a zero exponent?

Tip: Always simplify terms with the same base by adding or subtracting their exponents according to their positions (numerator/denominator).