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SHARYGIN 2021 Problem 95

    Let OO be the clrcumcenter of triangle ABCABC . Points XX and YY on side BCBC are such that AX=BXAX = BX and AY=CYAY = CY . Prove that the circumcircle of triangle AXYAXY passes through the circumceuters of triangles AOBAOB and AOCAOC .

    Dataset text AI-MO AoPS. Quoted with source.

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