Simplify:
(i) (173 x 173 x 173 + 127 x 127 x 1270/ (173 x 173 - 173 x 127 + 127 x 127)
(ii) (155 x 155 x 155 - 55 x 55 x 55)/ (155 x 155 + 155 x 55 + 55 x 55)
