Выполните деление: (18m^3n^4)/(25p^6q^10)∶(-(4m^2n^9)/(75p^5q^12)).

\[\frac{18m^{3}n^{4}}{25p^{6}q^{10}}\ :\left( - \frac{4m^{2}n^{9}}{75p^{5}q^{12}} \right) =\]

\[= - \frac{18m^{3}n^{4} \cdot 75p^{5}q^{12}}{25p^{6}q^{10} \cdot 4m^{2}n^{9}} =\]

\[= - \frac{27mq²}{2pn^{5}}\]