$${\mathtt{y}} = {\mathtt{8}}{\mathtt{\,\times\,}}{\left({\mathtt{4}}{\mathtt{\,\times\,}}{\mathtt{\,-\,}}{\frac{{\mathtt{5}}}{{\mathtt{20}}}}\right)}^{{\mathtt{2}}}{\mathtt{\,\small\textbf+\,}}{\mathtt{5}}{\mathtt{\,\times\,}}{\mathtt{\,-\,}}\left({\frac{{\mathtt{5}}}{{\mathtt{20}}}}\right){\mathtt{\,-\,}}{\mathtt{6}} \Rightarrow {\mathtt{y}} = {\mathtt{0.75}}$$
