6 4 / 1 6 = 6̶ 4 / 1 6̶ = 4 / 1

2 6 / 6 5 = 2 6̶ / 6̶ 5 = 2 / 5

9 5 / 1 9 = 9̶ 5 / 1 9̶ = 5 / 1

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[1] https://en.wikipedia.org/wiki/Anomalous_cancellation