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wok earned this badge 3 times
nov 24 at 14:59
Funny identities
nov 2 at 14:54
Zero to the zero power - Is $0^0=1$?
oct 19 at 8:47
Proving the identity $\sum\limits_{k=1}^n {k^3} = \left(\sum\limits_{k=1}^n k\right)^2$ without induction

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