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Latest: 3 cubes
x^3 + y^3 + z^3 = w^3.

The smallest set of positive integers x,y,z,w qualifying as a solution of the bolded equation above is: 3,4,5,6

a.Find some other sets of distinct integers, not necessarily positive.
b. Provide some comments on "The sum of 3 cubes is a cube" equation.

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