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hamujirou2015
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対数螺旋
standingwave-reflection-free
sine-wave
目で見る立方体の2等分
正１７角形 作図 regular 17-gon
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random function
反比例のグラフの変化の割合
Copy of ２つの円の位置関係
主成分の座標変換
関数の増減と極値
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Combinatorics
Pythagoras or Pythagorean Theorem
Rational Numbers
Expected Value
Complex Numbers