Uploaded August 2019 | Updated September 2026, 1 week ago

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Identity with (n-1) choose w: youtu.be/-qxZYAiMRBU
Beta function integral: youtu.be/7VoOEkQYh00

Fematika's solution: youtu.be/Hz0BBYYSC5Q

A math competition problem from Hong Kong. We'll need every trick in the book to solve this one!

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