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An application of the macros in http://tex.stackexchange.com/a/136767/4427 \documentclass{article} \usepackage{amsmath} \usepackage{xparse} \ExplSyntaxOn \DeclareDocumentCommand{\xDeclarePairedDelimiter}{mmmO{}} { \NewDocumentCommand{#1}{sO{}m} { \IfBooleanTF{##1} { \egreg_paired_delimiter_expand:nnnn {#2}{#3}{##3}{#4} } { ...


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Here is a macro that does auto scaling, but also allows you to manually specify a size if so desired. You can also specif a prefix for the limits if so desired as in the last example on the first group: Notes: The manually specified size example as just illustrate the possibilities in the size that you can select. I am not suggesting that all those ...


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If you can link to images in the particular forum, you can use the CodeCogs LaTeX equation editor, which produces an image, that can also be directly linked. The image is even produced with a nice URL like http://latex.codecogs.com/png.latex?\sum^{i%3D\infty}_{i%3D0}x_{i}} and produces an image which can be directly embedded (with proper URL encoding for ...



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