<<< native [ EDelimited "(" ")" [ Right (EArray [ AlignCenter ] [ [ [ EIdentifier "U" ] ] , [ [ EIdentifier "V" ] ] ]) ] , ESymbol Rel "=" , EDelimited "(" ")" [ Right (EArray [ AlignCenter ] [ [ [ EIdentifier "U" ] ] , [ [ EIdentifier "V" ] ] ]) ] ] >>> eqn left ( matrix{ ccol{ U above V } } right ) = left ( matrix{ ccol{ U above V } } right )