\begin{equation}x^{2}=36\end{equation}

\begin{equation}6x^{2}-486=0\end{equation}

\begin{equation}10x^{2}=360\end{equation}

\begin{equation}8(x-7)(x-7)=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}{6} \times (x+8)(x-8)=0\end{equation}