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Popular Examples
std 10,12,13,14,14,16,18,23,24,26
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std\:10,12,13,14,14,16,18,23,24,26
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C(10,2)
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C(10,2)
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C(13,1)
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C(13,1)
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c(11,4)
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c(11,4)
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15 choose 4
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15C4
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