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The answer will depend on what you mean by "do the sum". Why not simply add them together?

For example 93 = 729 and 103 = 1000 so 93 + 103 = 729 + 1000 = 1729.

NB: Totally irrelevant to the question, but the above example is the smallest integer that can be expressed as a sum of two positive cubes in two different ways - as Ramanujan was to inform the Cambridge (UK) mathematician Hardy.

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12y ago

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More answers

a3 + b3 = (a + b)(a2 - ab + b2)

a3 - b3 = (a - b)(a2 + ab + b2)

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12y ago
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a3 + b3 = (a + b)(a2 - ab + b2)

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10y ago
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