Top Network Posts

• 40Can you complete the expression $2 \underline{ }\, \underline{ }\, \underline{ } \,\underline{ } 5 = 2015$?
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• 24Another PhD student is going to present my research
• 22Why $e^x$ never equal $x$?
• 20Google's doodle on kids coding: shortest program solving all the levels
• 19Find $x,y,z>0$ such that $x+y+z=1$ and $x^2+y^2+z^2$ is minimal
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