Member: User_7bx5nj
The best expert ever	Jun 28 2015
Member: mohammed
great tutor	Jun 28 2015
Member: john11
Perfect	Jun 27 2015
Member: sga
perfect as always.Thank you very much	Jun 7 2015
Member: sga
Excellent	May 30 2015
Member: sga
Very good	May 29 2015
Member: sga
Best one in physics	May 20 2015
Member: AGJED
Good	May 14 2015
Member: User_7bx5nj
The best here.	May 1 2015
Member: mamdouhsaeed
he is always my best. thanks brother	Apr 20 2015
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