\begin{equation}\frac{6x^{2}}{4} \times \frac{9}{x}\end{equation}

\begin{equation}\frac{2x}{x-10} \times \frac{7(x-10)}{9x}\end{equation}

\begin{equation}\frac{x+9}{x+3} \times \frac{x+3}{x+5}\end{equation}

\begin{equation}\frac{6(x+3)}{x+4} \times \frac{10(x+4)}{6}\end{equation}

\begin{equation}\frac{16x^{2}}{14} \times \frac{7}{64x^{5}}\end{equation}

\begin{equation}\frac{20}{8(x+9)} \times \frac{8(x+9)}{30}\end{equation}

\begin{equation}\frac{x+9}{8(x+10)} \times \frac{x+10}{x^{2}+14x+45}\end{equation}

\begin{equation}\frac{8x}{100x^{2}-1} \times \frac{10x^{2}+71x+7}{32}\end{equation}

\begin{equation}\frac{2(x+3)}{x^{2}+11x+24} \times (x+8)(x+6)\end{equation}

\begin{equation}\frac{8x^{2}y^{5}}{x^{3}} \times \frac{3x^{2}}{5y}\end{equation}

\begin{equation}\frac{9x^{2}}{6} \times \frac{3}{27x^{5}}\end{equation}

\begin{equation}\frac{5}{10(x+4)} \times (x^{2}+12x+32)\end{equation}

\begin{equation}\frac{4(x+4)}{5} \times \frac{25x}{x+4}\end{equation}

\begin{equation}\frac{4x^{2}+xy^{3}}{y^{3}} \times \frac{3(xy+5y)}{x^{2}+5x}\end{equation}