निम्न को सरल कीजिए ।
(i) `(4x + 2y)^(3) + (4x - 2y)^(3)`
(ii) `(4x + 2y)^(3) - (4x - 2y)^(3)`
(iii) `(a+3)^(3) + (a-3)^(3)`

Explanation

(i) `128x^(3) + 96xy^(2)`
(ii) `16y^(3)+192x^(2)y`
(iii) `2a^(3)+54a`