a(2+4) + a(6-1) =
6a+5a=11a
$${a}{\left({\mathtt{2}}{\mathtt{\,\small\textbf+\,}}{\mathtt{4}}\right)}{\mathtt{\,\small\textbf+\,}}{a}{\left({\mathtt{6}}{\mathtt{\,-\,}}{\mathtt{1}}\right)} = ABC{\mathtt{\,\small\textbf+\,}}ABC$$
+1222 
