Laws of Index 6

\(\left({x}^{-4}{y}^{3}{w}^{4}\right)\left({y}^{-4}{z}^{5}\right)=\left(1\right)\left(1\right){x}^{-4}{y}^{3-4}{z}^{5}{w}^{4}={x}^{-4}{y}^{-1}{z}^{5}{w}^{4}\)