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工具：PlaneArrows, PlaneText... (v.2)
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
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Claude 解幾何題
國旗 (Claude 版)
Earth with coastline
長方體平面投影 (Codex版)
伊朗國旗 (Codex╱2026.10.07)
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平行綫的斜率
pyramid01 by Mr LO WY
第四次:20190308
函数的单调性和导数的副本
C60足球模型（金丝彩球）
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Diagrams
Piecewise Functions
Cosine
Algebra
Sequences and Series