Simplify the expression completely: \( \frac{1}{2 y^{-4}}=\square \)

To simplify the expression \( \frac{1}{2 y^{-4}} \), we can first recall that \( y^{-4} \) is equivalent to \( \frac{1}{y^4} \). Thus, the expression can be rewritten as follows: \[ \frac{1}{2 y^{-4}} = \frac{1}{2 \cdot \frac{1}{y^4}} = \frac{y^4}{2} \] So, the simplified expression is: \[ \frac{y^4}{2} \]