$${\mathtt{256}}{\mathtt{\,\small\textbf+\,}}\left({\frac{{\mathtt{1}}}{{\mathtt{4}}}}{\mathtt{\,\times\,}}{\mathtt{x}}\right){\mathtt{\,\times\,}}\left({\frac{{\mathtt{1}}}{{\mathtt{4}}}}{\mathtt{\,\times\,}}{\mathtt{x}}\right) = \left({\frac{{\mathtt{1}}}{{\mathtt{2}}}}{\mathtt{\,\times\,}}{\mathtt{x}}\right){\mathtt{\,\times\,}}\left({\frac{{\mathtt{1}}}{{\mathtt{2}}}}{\mathtt{\,\times\,}}{\mathtt{x}}\right)$$
$${\mathtt{256}}{\mathtt{\,\small\textbf+\,}}{\frac{{{\mathtt{x}}}^{{\mathtt{2}}}}{{\mathtt{16}}}} = {\frac{{{\mathtt{x}}}^{{\mathtt{2}}}}{{\mathtt{4}}}}$$ $${\frac{{{\mathtt{x}}}^{{\mathtt{2}}}}{{\mathtt{4}}}} = {\frac{{\mathtt{4}}{\mathtt{\,\times\,}}{{\mathtt{x}}}^{{\mathtt{2}}}}{{\mathtt{16}}}}$$
$${\mathtt{256}} = {\frac{{\mathtt{4}}{\mathtt{\,\times\,}}{{\mathtt{x}}}^{{\mathtt{2}}}}{{\mathtt{16}}}}{\mathtt{\,-\,}}{\frac{{\mathtt{1}}{\mathtt{\,\times\,}}{{\mathtt{x}}}^{{\mathtt{2}}}}{{\mathtt{16}}}}$$
$${\mathtt{256}} = {\frac{{\mathtt{3}}{\mathtt{\,\times\,}}{{\mathtt{x}}}^{{\mathtt{3}}}}{{\mathtt{16}}}}$$ => $${{\mathtt{x}}}^{{\mathtt{2}}} = {\frac{{\mathtt{256}}{\mathtt{\,\times\,}}{\mathtt{16}}}{{\mathtt{3}}}}$$ ; $${\mathtt{256}}{\mathtt{\,\times\,}}{\mathtt{16}} = {{\mathtt{2}}}^{{\mathtt{8}}}{\mathtt{\,\times\,}}{{\mathtt{2}}}^{{\mathtt{4}}} = {{\mathtt{2}}}^{{\mathtt{12}}}$$
$${\mathtt{256}}{\mathtt{\,\small\textbf+\,}}\left({\frac{{\mathtt{1}}}{{\mathtt{4}}}}{\mathtt{\,\times\,}}{\mathtt{x}}\right){\mathtt{\,\times\,}}\left({\frac{{\mathtt{1}}}{{\mathtt{4}}}}{\mathtt{\,\times\,}}{\mathtt{x}}\right) = \left({\frac{{\mathtt{1}}}{{\mathtt{2}}}}{\mathtt{\,\times\,}}{\mathtt{x}}\right){\mathtt{\,\times\,}}\left({\frac{{\mathtt{1}}}{{\mathtt{2}}}}{\mathtt{\,\times\,}}{\mathtt{x}}\right)$$
$${\mathtt{256}}{\mathtt{\,\small\textbf+\,}}{\frac{{{\mathtt{x}}}^{{\mathtt{2}}}}{{\mathtt{16}}}} = {\frac{{{\mathtt{x}}}^{{\mathtt{2}}}}{{\mathtt{4}}}}$$ $${\frac{{{\mathtt{x}}}^{{\mathtt{2}}}}{{\mathtt{4}}}} = {\frac{{\mathtt{4}}{\mathtt{\,\times\,}}{{\mathtt{x}}}^{{\mathtt{2}}}}{{\mathtt{16}}}}$$
$${\mathtt{256}} = {\frac{{\mathtt{4}}{\mathtt{\,\times\,}}{{\mathtt{x}}}^{{\mathtt{2}}}}{{\mathtt{16}}}}{\mathtt{\,-\,}}{\frac{{\mathtt{1}}{\mathtt{\,\times\,}}{{\mathtt{x}}}^{{\mathtt{2}}}}{{\mathtt{16}}}}$$
$${\mathtt{256}} = {\frac{{\mathtt{3}}{\mathtt{\,\times\,}}{{\mathtt{x}}}^{{\mathtt{3}}}}{{\mathtt{16}}}}$$ => $${{\mathtt{x}}}^{{\mathtt{2}}} = {\frac{{\mathtt{256}}{\mathtt{\,\times\,}}{\mathtt{16}}}{{\mathtt{3}}}}$$ ; $${\mathtt{256}}{\mathtt{\,\times\,}}{\mathtt{16}} = {{\mathtt{2}}}^{{\mathtt{8}}}{\mathtt{\,\times\,}}{{\mathtt{2}}}^{{\mathtt{4}}} = {{\mathtt{2}}}^{{\mathtt{12}}}$$