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niveau collège: https://www.youtube.com/watch?v=x2ZAEQPHa8Q
niveau lycée: https://www.youtube.com/watch?v=eYsj80Mpa2w
your comment
niveau collège: https://www.youtube.com/watch?v=x2ZAEQPHa8Q
niveau lycée: https://www.youtube.com/watch?v=eYsj80Mpa2w