\begin{equation}x^{2}=64\end{equation}

\begin{equation}4x^{2}-36=0\end{equation}

\begin{equation}6x^{2}=216\end{equation}

\begin{equation}10(x-7)(x-5)=0\end{equation}

\begin{equation}\frac{1}{x+6}=\frac{x^{2}}{x^{2}-36}-(\frac{1}{x-6})\end{equation}

\begin{equation}\frac{1}{10} \times (x+5)(x-5)=0\end{equation}