X*y2

It looks like you're presenting an expression, but it's not entirely clear what you're asking. If you could clarify, I can assist you better. Here are a few possible interpretations:

1. Multiplication: If you're looking to simplify or evaluate \( X \cdot y^2 \), that's the multiplication of \( X \) and \( y^2 \).

2. Solving an equation: If this is part of an equation (like \( X \cdot y^2 = k \)), let me know what \( k \) is, and I can help you solve for the unknown.

3. Calculus: If you're looking to find a derivative or integral related to this expression, please specify.

Feel free to provide more details or clarify your question!