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Someone

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Someone last won the day on December 8 2016

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  1. Simulasi OSN Matematika KTO Mei 2017 No 3

    Dari ketaksamaan holder kak, 1 nya itu dari (a+b+c)^3, $3abc+2(ab+bc+ac)$ itu $\sigma{a(bc+1-a)}$
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