Simplify the expression. \( \left(-n^{5}\right)^{5}=\square \)

To simplify the expression \((-n^{5})^{5}\), you apply the power of a power rule. This means you multiply the exponents: \((-n^{5})^{5} = -1^{5} \cdot (n^{5})^{5} = -1 \cdot n^{25} = -n^{25}\). So, the simplified expression is \(-n^{25}\). If you need to simplify it even more, just remember that this indicates that \(n\) is raised to the 25th power but has a negative sign in front of it!