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  • (cur | prev) 18:37, 7 October 2008โ€Ž Jmazzei (Talk)โ€Ž . . (172 bytes) (+172)โ€Ž . . (New page: One thing I have had difficulty with is the change of variable in regard to summations. Two examples of this that come to mind are the first and third problems on the exam.)

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