2.20.2 Greatest hits from previous weeks

Greatest hits from previous weeks:

2.20.2.1 Big Parenthesis in an Equation

http://tex.stackexchange.com/questions/38868/big-parenthesis-in-an-equation

I have an equation contained inside \[...\], which automatically makes a \sum with sub- and superscripts turn big--so that the summation sign looks awkward inside parenthesis.  Any idea how to make  ...
 

- asked by jamaicanworm (72 votes), answered by qubyte (113 votes)

2.20.2.2 Why do the less than symbol (<) and the greater than symbol (>) appear wrong as upside down exclamation (A^\[DownExclamation]) or question mark (A^\[DownQuestion])?

http://tex.stackexchange.com/questions/2369/why-do-the-less-than-symbol-and-the-greater-than-symbol-appear-wrong-as

When typing < or > in LaTeX and compiling with pdflatex, the less than and greater than symbols appear at upside down exclamation points. I'm not in math mode.
 

- asked by biased_estimator (147 votes), answered by Stefan Kottwitz (139 votes)