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Fen Lán Chén

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Stand Alone

Regular Polygons Applied New Theory of Trisection to Construct a Regular Heptagon for Centuries in the History of Mathematics
New Theory of Trisection Solved the Most Difficult Math Problem for Centuries in the History of Mathematics
Xiang xia lao shi he cheng shi lao shi
Mă yĭ hé xi shuaì
Ai piao liang de wu ya