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Arnulfo Hein

@arnulfohein17

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Name	Arnulfo Hein

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Recent Series

小迪知识录 (3)
Durtles Problems of the Weeks (72)
小辉与小希 (3)
a softer world (1)
小丹故事集 (18)

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dandelion (admin)
Durtles
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Number Line Mirrors
Area-Bisecting Lines
Circle-Bisecting Lines
Chord-bisecting Chords
Friendly Factor Pairs

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