evalute (104) cube and (999)cube
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⠀⠀⠀⠀⠀⠀⠀ =
By using identity :-
⠀⠀=
⠀⠀⠀⠀= + +
⠀⠀⠀⠀= + +
⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀ =
By using identity :-
=
⠀⠀⠀⠀⠀= - - ⠀
⠀⠀⠀⠀⠀⠀
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