<<< native [ ENumber "2" , ENumber "5" , EGrouped [ EIdentifier "y" , ESymbol Bin "+" , ENumber "3" ] , EGrouped [ EIdentifier "x" , ESymbol Bin "+" , ENumber "3" ] , EGrouped [ EIdentifier "x" , ESymbol Bin "+" , EIdentifier "\945" ] , EArray [ AlignCenter , AlignCenter ] [ [ [ ENumber "2" ] , [ ENumber "3" ] ] , [ [ ENumber "4" ] , [ ENumber "5" ] ] ] ] >>> tex 25{y + 3}{x + 3}{x + \alpha}\begin{matrix} 2 & 3 \\ 4 & 5 \end{matrix}