Style/macros for outlines in Plain TeX

Grouped multi-column nomenclature

Macro for the average width of a character

How can I align two split environments at the equal signs?

How to create Multilevel Colored Boxes using tcolorbox/any other package?

Typesetting the square of a mathematical operator

Multicolumn within a newcommand error

Large negative spaces

Is there an easy way of using line thickness as error indicator in a plot?

How can I plot two lines in the same style (using cycle lists) with pgfplots?

Remove citation from List of Figures

Different labels for subsection titles and references

How can I get to use the sideset command on unusual symbols without an error message

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