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Search for a Word in a String - Python Programming Challenges
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Janusz
办美国文凭加拿大文凭澳洲文凭英国文凭学位证毕业证成绩单
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Wendy Ye
![Prove that |[a - b - c, 2a, 2a],[2b, b - c - a, 2b],[2c, 2c, c - a - b]| = (a + b +c)^3](http://i.ytimg.com/vi/F6Kll3fQIB0/mqdefault.jpg "Prove that |[a - b - c, 2a, 2a],[2b, b - c - a, 2b],[2c, 2c, c - a - b]| = (a + b +c)^3")
![2 Surah Al-Baqara [v3]](http://i.ytimg.com/vi/FLV4JxNGxwg/mqdefault.jpg "2 Surah Al-Baqara [v3]")
