用方框和箭头突出显示方程式

Question

我还没有尝试过，对此也没有任何想法？有人可以帮忙吗？提前谢谢大家！！

Answer 1

这可能是一种结合tcolorbox和的解决方案TiKZ。

\documentclass{article}
\usepackage[most]{tcolorbox}
\usepackage{mathtools}
\usetikzlibrary{decorations.pathreplacing}

\tcbset{
    boxmath/.style 2 args={%
        enhanced,
        sharp corners, colback=white,
        colframe=#1, remember as=#2, size=fbox}
    }
    
\begin{document}
\[
e^x=\tcboxmath[boxmath={blue}{approx}]{1+x+\frac{x^2}{2!}+\frac{x^3}{3!}+\dots++\frac{x^n}{n!}}+\tcboxmath[boxmath={red}{trunc}]{\frac{x^{n+1}}{{n+1}!}+\dots}
\]

\begin{tikzpicture}[remember picture, overlay, font=\sffamily]
\draw[blue,->] (approx.north) --++(120:5mm) node[anchor=south]{Approximation};
\draw[red,->] (trunc.north) --++(70:5mm) node[anchor=south]{Truncation Errors};
\draw[decorate, decoration={brace, mirror, raise=3pt, amplitude=2mm}] (approx.south west)--(trunc.south east) node[below=3mm, midway]{Exact mathematical formulation};
\end{tikzpicture}
\end{document}