Simplify. Express your answer as a single fraction in simplest fo \( \frac{3}{2 p^{4} q}-\frac{5}{2 p^{4} q} \)

To simplify the expression, you can combine the fractions since they have the same denominator. \[ \frac{3}{2 p^{4} q} - \frac{5}{2 p^{4} q} = \frac{3 - 5}{2 p^{4} q} = \frac{-2}{2 p^{4} q} \] Now, simplify the fraction: \[ \frac{-2}{2 p^{4} q} = \frac{-1}{p^{4} q} \] So, the simplified expression is: \[ \frac{-1}{p^{4} q} \]