\begin{equation}\frac{8x^{2}}{10} \times \frac{9}{x}\end{equation}

\begin{equation}\frac{6x}{x-9} \times \frac{3(x-9)}{2x}\end{equation}

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

\begin{equation}\frac{3(x+5)}{x+7} \times \frac{2(x+7)}{3}\end{equation}

\begin{equation}\frac{100x^{2}}{30} \times \frac{5}{1000x^{5}}\end{equation}

\begin{equation}\frac{80}{9(x+5)} \times \frac{4(x+5)}{40}\end{equation}

\begin{equation}\frac{x+10}{2(x+2)} \times \frac{x+2}{x^{2}+13x+30}\end{equation}

\begin{equation}\frac{10x}{81x^{2}-1} \times \frac{9x^{2}+82x+9}{20}\end{equation}

\begin{equation}\frac{4(x+5)}{x^{2}+15x+50} \times (x+10)(x+4)\end{equation}

\begin{equation}\frac{35x^{2}y^{5}}{x^{3}} \times \frac{7x^{2}}{5y}\end{equation}

\begin{equation}\frac{9x^{2}}{56} \times \frac{7}{27x^{5}}\end{equation}

\begin{equation}\frac{9}{7(x+10)} \times (x^{2}+12x+20)\end{equation}

\begin{equation}\frac{9(x+7)}{9} \times \frac{72x}{x+7}\end{equation}

\begin{equation}\frac{8x^{2}+xy^{3}}{y^{3}} \times \frac{5(xy+3y)}{x^{2}+3x}\end{equation}