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I share your concerns. I often end up adding phantom subscripts in these case, which can be added to make the appearance more uniform. (In the presence of a subscript, the superscript moves up.) \documentclass{article} \usepackage{amsmath} \newcommand{\PP}{_{\vphantom{Lg}}} \begin{document} \[ L\PP^p \quad \left\|.\right\|_{L\PP^p} \quad \|.\|^{...

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Try this: \documentclass{article} \usepackage{amsmath} \begin{document} \fbox{SK$_{i,\mathrm{GID}}$} \end{document}

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What you need is some strategic placement of curly braces. Basically, you can't just type a^b^c in LaTeX, because it woudn't understand that the entire b^c part is supposed to be the superscript. Instead, you have to enclose that in braces, like this: a^{b^c}. The same thing happens in your equation - you just need to sprinkle in some more braces. The ...

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The contents of a tabular environment are processed in text mode by default, even if the tabular environment occurs inside a display-math environment such as align*. Since the ^ character has a special meaning in TeX and LaTeX documents, you need to switch to math mode in order to get 2^{25} processed correctly, assuming you want to keep using a tabular ...

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To make the math expression look better, I would not bother with either shifting up the large square brackets or with pulling down the exponent term. Instead, I would use inline-fraction notation to reduce the needlessly large vertical size of the exponent term; this adjustment will also let you use less-prominent square brackets. And, it will make the ...

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