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Author:
Vrentzos Antonis
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r=ασυνκθ
apec
Basic Percent Exercises (V2)
以竹簽拼砌三角形
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Проведи ось симметрии: Лев Петряков 6б
Experiment #1
Chase's Book
Octagon to Square Dissection
Explore the invariant lines of matrix {{-2,5},{6,-9}}