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Refaat M. Sayed's user avatar
Refaat M. Sayed's user avatar
Refaat M. Sayed's user avatar
Refaat M. Sayed
  • Member for 7 years, 3 months
  • Last seen more than 5 years ago
  • Egypt
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Iam a undergraduate Civil-Engineering student at beni-suef university in Egypt.

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48 pieces on one board
Nov 2, 2016
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Find $\int\limits^{\infty}_{0}\frac{1}{(x^8+5x^6+14x^4+5x^2+1)^4}dx$
5
Find $\int_0^{2\pi}\frac1{5-4\cos x}\ dx$

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