$${\mathtt{0}}{\mathtt{\,\small\textbf+\,}}{\mathtt{50}}{\mathtt{\,\times\,}}{\mathtt{1}}{\mathtt{\,-\,}}{\mathtt{60}}{\mathtt{\,-\,}}{\mathtt{60}}{\mathtt{\,\times\,}}{\mathtt{0}}{\mathtt{\,\small\textbf+\,}}{\mathtt{10}}$$
$${\mathtt{0}}{\mathtt{\,\small\textbf+\,}}{\mathtt{50}}{\mathtt{\,-\,}}{\mathtt{60}}{\mathtt{\,-\,}}{\mathtt{60}}{\mathtt{\,\times\,}}{\mathtt{0}}{\mathtt{\,\small\textbf+\,}}{\mathtt{10}}$$
$${\mathtt{0}}{\mathtt{\,\small\textbf+\,}}{\mathtt{50}}{\mathtt{\,-\,}}{\mathtt{60}}{\mathtt{\,-\,}}{\mathtt{0}}{\mathtt{\,\small\textbf+\,}}{\mathtt{10}}$$
$${\mathtt{50}}{\mathtt{\,-\,}}{\mathtt{60}}{\mathtt{\,-\,}}{\mathtt{0}}{\mathtt{\,\small\textbf+\,}}{\mathtt{10}}$$
$${\mathtt{\,-\,}}{\mathtt{10}}{\mathtt{\,-\,}}{\mathtt{0}}{\mathtt{\,\small\textbf+\,}}{\mathtt{10}}$$
$${\mathtt{\,-\,}}{\mathtt{10}}{\mathtt{\,\small\textbf+\,}}{\mathtt{10}}$$
$${\mathtt{0}}$$
.$${\mathtt{0}}{\mathtt{\,\small\textbf+\,}}{\mathtt{50}}{\mathtt{\,\times\,}}{\mathtt{1}}{\mathtt{\,-\,}}{\mathtt{60}}{\mathtt{\,-\,}}{\mathtt{60}}{\mathtt{\,\times\,}}{\mathtt{0}}{\mathtt{\,\small\textbf+\,}}{\mathtt{10}}$$
$${\mathtt{0}}{\mathtt{\,\small\textbf+\,}}{\mathtt{50}}{\mathtt{\,-\,}}{\mathtt{60}}{\mathtt{\,-\,}}{\mathtt{60}}{\mathtt{\,\times\,}}{\mathtt{0}}{\mathtt{\,\small\textbf+\,}}{\mathtt{10}}$$
$${\mathtt{0}}{\mathtt{\,\small\textbf+\,}}{\mathtt{50}}{\mathtt{\,-\,}}{\mathtt{60}}{\mathtt{\,-\,}}{\mathtt{0}}{\mathtt{\,\small\textbf+\,}}{\mathtt{10}}$$
$${\mathtt{50}}{\mathtt{\,-\,}}{\mathtt{60}}{\mathtt{\,-\,}}{\mathtt{0}}{\mathtt{\,\small\textbf+\,}}{\mathtt{10}}$$
$${\mathtt{\,-\,}}{\mathtt{10}}{\mathtt{\,-\,}}{\mathtt{0}}{\mathtt{\,\small\textbf+\,}}{\mathtt{10}}$$
$${\mathtt{\,-\,}}{\mathtt{10}}{\mathtt{\,\small\textbf+\,}}{\mathtt{10}}$$
$${\mathtt{0}}$$