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Corrections for adjacent fraction
1. typo: 20/19 - 1/19 = 1 by ariels on 2002-06-23 11:06:39 (accepted)
2. lots of grammar mistakes by djao on 2002-06-21 23:31:14 (accepted)
3. ad-bd=1 by AxelBoldt on 2002-06-21 19:58:27 (accepted)

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