The expression \( x^3(2 + y^5) \) is already in a simplified form. However, if you want to expand it, you can distribute \( x^3 \) to both terms inside the parentheses:
\[ x^3(2 + y^5) = x^3 \cdot 2 + x^3 \cdot y^5 \]
Therefore, the equivalent expression is:
\[ 2x^3 + x^3y^5 \]
So, \( x^3(2 + y^5) \) is equivalent to \( 2x^3 + x^3y^5 \).