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marți, 15 februarie 2022

aops, Brasil Girls Math Tournament, 2021 https://artofproblemsolving.com/community/c6t48f6h2780698_ltcmd_806040_triangle_cd__ab2


 

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Mi Prepa, https://www.facebook.com/photo?fbid=1427344626075511&set=a.575642501245732

  Mi Prepa, https://www.facebook.com/photo?fbid=1427344626075511&set=a.575642501245732 In the interior of triangle ABC having ...