\begin{equation}\sqrt{7} \times \sqrt{7}\end{equation}

\begin{equation}\sqrt{2} \times \sqrt{162}\end{equation}

\begin{equation}\sqrt{49} \times \sqrt{70}\end{equation}

\begin{equation}\sqrt{196} \times \sqrt{5}\end{equation}

\begin{equation}\frac{\frac{\sqrt{10}}{4} \times \sqrt{4}}{5}\end{equation}

\begin{equation}(9-\sqrt{9}) \times (9+\sqrt{9})\end{equation}

\begin{equation}(4 \times \sqrt{8})^{2}\end{equation}

\begin{equation}\sqrt{(10x)}\sqrt{(2x+6)}\end{equation}

\begin{equation}\sqrt{(7x)}\sqrt{(28x^{3})}\end{equation}

\begin{equation}9\sqrt{(24x)}\sqrt{(36x)}\end{equation}

\begin{equation}4\sqrt{(5x)}\sqrt{(486x)}\end{equation}

\begin{equation}9\sqrt{(4x)}\sqrt{(12x)}\end{equation}