यदि `A=[{:((2)/(3),1,(5)/(3)),((1)/(3),(2)/(3),(4)/(3)),((7)/(3),2,(2)/(3))]"तथा "B=[((2)/(5),(3)/(5),1),((1)/(5),(2)/(5),(4)/(5)),((7)/(5),(6)/(5),(2)/(5)):}]`, तो 3A-5B परिकलित कीजिए।