\begin{equation}\frac{10x^{2}}{9} \times \frac{3}{x}\end{equation}

\begin{equation}\frac{7x}{x-4} \times \frac{6(x-4)}{7x}\end{equation}

\begin{equation}\frac{x+4}{x+2} \times \frac{x+2}{x+2}\end{equation}

\begin{equation}\frac{4(x+6)}{x+6} \times \frac{8(x+6)}{4}\end{equation}

\begin{equation}\frac{64x^{2}}{36} \times \frac{4}{512x^{5}}\end{equation}

\begin{equation}\frac{40}{10(x+3)} \times \frac{2(x+3)}{20}\end{equation}

\begin{equation}\frac{x+5}{7(x+9)} \times \frac{x+9}{x^{2}+14x+45}\end{equation}

\begin{equation}\frac{9x}{9x^{2}-1} \times \frac{3x^{2}+22x+7}{18}\end{equation}

\begin{equation}\frac{7(x+9)}{x^{2}+14x+45} \times (x+5)(x+7)\end{equation}

\begin{equation}\frac{20x^{2}y^{5}}{x^{3}} \times \frac{9x^{2}}{6y}\end{equation}

\begin{equation}\frac{64x^{2}}{72} \times \frac{9}{512x^{5}}\end{equation}

\begin{equation}\frac{8}{9(x+10)} \times (x^{2}+19x+90)\end{equation}

\begin{equation}\frac{8(x+7)}{9} \times \frac{36x}{x+7}\end{equation}

\begin{equation}\frac{9x^{2}+xy^{3}}{y^{3}} \times \frac{3(xy+2y)}{x^{2}+2x}\end{equation}