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  1. 05-02-2014, 11:24 PM Top | #1
    Apr 2014
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  3. 05-03-2014, 12:13 PM Top | #2
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  4. 05-04-2014, 02:31 AM Top | #3
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    ....
    Mostafa Saafan a 1 ﻷ 0 arctan 1 = Pi/4 0


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