How one can achieve that in the Stack Exchange questions/answers one types Greek letters, other symbols and symbols with subscripts?
36985
Which Stack Exchange sites use MathJax?
123747
How would you typeset the following
136665
Text across several summation symbols
118228
"Use Option as Meta key" with ability to type the # symbol
136288
Extracting subscripts and superscripts
12171
Left and right subscript / superscript
104672
Greek `\chi`'s subscript expressions: how to make it smaller or offset lower?
109769
Listing with mixed english and russian symbols in comments
103813
How to use subscript in pattern names?
87073
Mirror greek symbol in math environment
150496
What alternative notation of subscripts/superscripts that are also treated as SYMBOLS in Mathematica?
106798
How can I have the three source-code symbols _  produce themselves (_ ) in the typeset output by default?
154920
How to track part of symbol or how to symbolize parts of symbol without copying data?
12615
How to type special/accented letters in LaTeX?
145810
Superimpose letter on integral symbol
130527
How to read letters such as $\mathbb A$, $\mathbb B$, etc., or $\mathfrak A$, $\mathfrak B$, etc.?
140420
Display historical characters "uͤ", "oͤ" and "aͤ"?