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AZ-MO 2020 Problem 4

    There is a non-equilateral triangle ABCABC .Let ABCABC 's Incentri II .Point DD is on the BCBC side.The circle drawn outside the triangle IBDIBD and ICDICD intersects the sides ABAB and ACAC at points EE and F.F. The circle drawn outside the triangle DEFDEF intersects the sides ABAB and ACAC at NN and MM .Prove that EM∥FNEM\parallel FN .

    Dataset text AI-MO AoPS. Quoted with source.

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