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5 log2 1 x 1 )u003d 4 log 2 1 y 1
5 log2 1 x 1 )u003d 4 log 2 1 y 1 pictures 5
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5 log2 1 x 1
5 log2 1 x 1 )u003d 4 log 2 1 y 1
