titles improve I have edited the title to remove \dfrac (which is recommended against): How do I show that $\frac{\exp(yz)}{\sum_{y'=0}^1\exp(y'z)} =\sigma((2y-1)z)$? Would it be better to write there something like "$\exp(yz)/\left(\sum_{y'=0}^1\exp(y'z)\right)$"? (Maybe add _\limits to the sum?)

titles Search returns 1835 questions with \dfrac in the title. According to SEDE, in 2193 posts \dfrac has been removed from the title: data.stackexchange.com/math/query/1066795/… data.stackexchange.com/math/query/1066798/…

[ SmokeDetector | MS ] Offensive body detected, potentially bad keyword in body (45): How to calculate this integral with residues by Joao Torres on math.SE

D1, D2, D3.

D4, D5, D6.

D7, D8, D9.

D10, D11, D12.

D13, D14, D15.

C1 is a PSQ and dupe of a FAQ. It was wrongly gold-badge reopened without any justification.

Downvote and delete?