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 May 9 wiki May 7 awarded Caucus Apr 21 awarded Nice Answer Apr 14 comment Factoring a long expression in the form $(a+b)^3 + (c - b)^3 - (c+b)^3$ @pen you have $(c-b)^3 - (c+a)^3$. Apr 14 comment Factoring a long expression in the form $(a+b)^3 + (c - b)^3 - (c+b)^3$ Internet problems I have so cannot come on chat. Heed the first comment. Mar 28 revised The ratiotest, why can't it be bigger than one? edited tags Mar 25 comment CSB inquality: is $\|x\|^2\|y\|^2 - \langle x,y \rangle^2$ a square in any obvious way? @PeterTamaroff Try that without the double negative. Mar 18 comment Solve the differential equation If $x=Py$, then $y=$? Mar 18 comment Modular homework problem I too downvoted for the same reason as Tobias. Mar 18 revised Compute using Complex Analysis: integral Asking a question and then changing it is as much a act of vandalism as is deleting the question text. Mar 18 suggested approved edit on Compute using Complex Analysis: integral Mar 14 comment The equivalence between Cauchy integral and Riemann integral for bounded functions What book are you using to study this? Mar 11 revised Localization of a ring which is not a domain Corrected the LaTeX thing for awllower. Mar 11 suggested approved edit on Localization of a ring which is not a domain Mar 4 comment Given a generating function for $\sum a_n z^n$, what is the generating function of $\sum a_n^2 z^n$ There seems to be something off in your title. Feb 20 comment Prove that for any $x \in \mathbb N$ such that \$x