UPSKILL MATH PLUS

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Find the sum of the series \((2^3 - 1) + (4^3 - 3^3) + (6^3 - 5^3) + … \) to:
 
(i) \(n\) terms \(=\) iii+iii
 
(ii) \(8\) terms \(=\)
 
[Note: Insert variables and numbers in separate boxes]