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Author:
Antony Chan
Testing 2 (Addition of vectors)
GeoGebra
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找出對稱軸
異分母分數減法
三位數除以一位數（一）
兩位數加法
画直线等分三角形的面积
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I am superman
平移
ggb7黃金螺線
再作万年历单晨
艾雪鑲嵌
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Frequency Distribution
Conic Sections
Linear Programming or Linear Optimization
Intersection
Arithmetic