Sometimes when I read my answers and comments from the past, they make no sense whatsoever...
Also if i make a comment on your question, I am only giving my 2 cents (no paper, no pen) $-$ just my initial thought, so if i am too off don't be alarmed.
17 Interesting and unexpected applications of $\pi$ feb 25 '14
6 I can't quite figure out this “separable equation” jun 16 '14
5 Prove that if $f(x+y)=f(x)f(y)$ and f is continuous in $ x=0$, then it is continuous in all its domain sep 16 '14
5 How to prove this series converges? apr 30 '14
4 Integral of $16/(1-\cos8x)$ may 2 '14
4 Find eigenvalues of $T$ if $T(w,z)=(z,w)$ feb 14 '14