\[\frac{9 + 6y + 4y^{2}}{2y - 1}\ :\frac{27 - 8y^{3}}{4y^{2} - 1} =\]
\[= \frac{\left( 9 + 6y + 4y^{2} \right) \cdot (2y - 1)(2y + 1)}{(2y - 1) \cdot (3 - 2y)\left( 9 + 6y + 4y^{2} \right)} =\]
\[= \frac{2y + 1}{3 - 2y}\]