\begin{equation}\frac{5x^{2}}{4} \times \frac{10}{x}\end{equation}

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

\begin{equation}\frac{x+3}{x+6} \times \frac{x+6}{x+6}\end{equation}

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

\begin{equation}\frac{81x^{2}}{27} \times \frac{9}{729x^{5}}\end{equation}

\begin{equation}\frac{48}{2(x+10)} \times \frac{2(x+10)}{56}\end{equation}

\begin{equation}\frac{x+4}{3(x+8)} \times \frac{x+8}{x^{2}+14x+40}\end{equation}

\begin{equation}\frac{8x}{81x^{2}-1} \times \frac{9x^{2}+37x+4}{32}\end{equation}

\begin{equation}\frac{6(x+4)}{x^{2}+6x+8} \times (x+2)(x+4)\end{equation}

\begin{equation}\frac{12x^{2}y^{5}}{x^{3}} \times \frac{9x^{2}}{9y}\end{equation}

\begin{equation}\frac{100x^{2}}{56} \times \frac{7}{1000x^{5}}\end{equation}

\begin{equation}\frac{8}{7(x+4)} \times (x^{2}+12x+32)\end{equation}

\begin{equation}\frac{7(x+2)}{10} \times \frac{80x}{x+2}\end{equation}

\begin{equation}\frac{5x^{2}+xy^{3}}{y^{3}} \times \frac{6(xy+5y)}{x^{2}+5x}\end{equation}