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La beauté des maths
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1 x = 9 12 x = x = x = x = x = x = x = x =
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1 x = x = x = x = x = x = x = x = x 9 +10=
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9 x = x = x = x = x = x = x = x =
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Admirez la symétrie … 1 x 1 = 1 11 x 11 = x 111 = x 1111 = x = x = x = x = x =
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