which of these is correct
(84)5 (73)9 = 84 + 573 + 9 = 89712
or
(84)5 (73)9 = 84•573•9 = 82072
(84)5 (73)9 = 84 + 573 + 9 = 89712
or
(84)5 (73)9 = 84•573•9 = 82072