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Author:
Đỗ Cao Long
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Explore the invariant lines of matrix {{-2,5},{6,-9}}
Shade a spheric triangle with "surface".
alg2_05_05_01_applet_exp_flvs
Roman Numerals Bingo
Flip Flop
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Den rette linje
Interactive Trigonometry Question 1
Forum_31278_A
Task 2/
NC-Ficha 32-Arlis