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Is there a LaTeX package that helps me keep track of whether I actually use all the labels and equation numbers that I introduce in my file or whether some of them are unnecessary? After revising a manuscript of a paper several times, I'm getting severely lost.

This is wonderful. Thank you so much!

Mark

Thank you for the answer!

I have the solutions in an appendix and (to make things slightly worse) sometimes omit solutions to exercises that I want to give my students as homework.

Is there a way to work around that?

In the MWE below, I use hyperref to link from a solution back to an exercise.

But is it possible to link back and forth, i.e., by clicking on the exercise, I go to the answer. Clicking on the number of the answer, I go back to the exercise?


\documentclass[english]{article}

\usepackage{hyperref ...

Thank you so much!

Mark

In the MWE below, I define an example environment with numbers in the margin. Its first line, however, is indented, rather than starting at the left margin. How to avoid this indentation? My guess \noindent does not work.

\documentclass{article}

\usepackage{ntheorem}
\theoremstyle{margin ...

Thanks, that looks really good! I tried a few other options and found a solution that is extremely ugly: I could extend stuff to the right, not to the left, so I shifted the text and background into the right margin and then used a negative shift in the \titlespacing ...

It's not pretty, but it ...

In the MWE below, the header for the exercises of section 1 has a colored background and the text itself is centered.

Since exercise numbers are in the left margin, I would like to extend this colored background into the left margin only (not the right!) by a centimeter or two. And still keep the ...

How can I get an equation number for the third line in the following MWE, where I nest align(ed) environments?

\documentclass{article}
\usepackage{amsmath}

\begin{document}
\begin{align}
\text{maximize } & \text{long expression} \\
\text{with } & \begin{aligned}[t]
a & \in A \\
b & \in B
\end ...

The ntheorem documentation states that it works with mdframed as well, but in that case, I know insufficient about LaTeX to use ntheorem to make the theorem's header appear as it does in the MWE on a colored background.