User talk:Ubaid.unkhattak

October 2012
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 * The following is the log entry regarding this message: Sum rule in differentiation was changed by Ubaid.unkhattak (u) (t) ANN scored at 0.971296 on 2012-10-19T09:31:53+00:00 . Thank you. ClueBot NG (talk) 09:31, 19 October 2012 (UTC)