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Dec 20, 2013 at 6:47 vote accept Kot
Dec 20, 2013 at 6:44 answer added John timeline score: 0
Dec 20, 2013 at 6:44 answer added Nana timeline score: 0
Dec 20, 2013 at 6:42 answer added mathlove timeline score: 0
Dec 20, 2013 at 6:42 answer added Zhoe timeline score: 1
Dec 20, 2013 at 6:40 comment added coffeemath Your answer is the same as Wolframs --- either factor out your numerator and rearrange, or else multiply out both to see they're the same.
Dec 20, 2013 at 6:30 history asked Kot CC BY-SA 3.0