\[\left( - 3a^{2}b^{3} \right)^{6} \cdot \left( - \frac{1}{3}a^{5}b^{4} \right)^{3} =\]
\[= - \frac{3^{6}}{3^{3}}a^{12}b^{18}a^{15}b^{12} =\]
\[= - 27a^{27}b^{30}\]