贫血缺什么元素

Question

How can I do the right bracket like that of the left hand side?

Answer 1

I will assume that you're interested in typesetting not just a tall curly brace or two, but also some of the other stuff that's shown in the screenshot you posted.

If that's the case, do look into using a Bmatrix* environment, which is provided by the mathtools package, a superset of the amsmath package.

\documentclass{article} % or some other suitable document class
\usepackage{mathtools}  % for 'Bmatrix*' environment

\begin{document}
\begingroup % limit scope of the next instruction
\centering
\hrule % draw a horizontal rule across the width of the text block
$\begin{Bmatrix*}[l]  % 'l': left-aligned contents
(123)(45),(123)(45),(123)(45),(123)(45),(123)(45),\\
(123)(45),(123)(45),(123)(45),(123)(45),(123)(45),\\
(123)(45),(123)(45),(123)(45),(123)(45),(123)(45),\\
(123)(45),(123)(45),(123)(45),(123)(45),(123)(45)\\
\end{Bmatrix*}$
\hrule
$\begin{Bmatrix*}[l]
(123),(123),(123),(123),(123),\\
(123),(123),(123),(123),(123),\\
(123),(123),(123),(123),(123),\\
(123),(123),(123),(123),(123)\\
\end{Bmatrix*}$
\hrule
\endgroup % end of scope of '\centering' instruction

\smallskip\noindent
Hello World. % optional
\end{document}

---

Addendum to address the OP's follow-up query: Here's how I would fix the code the OP posted in a comment to (a) make it compilable without errors and (b) create full-height curly braces. Observe the use of \left\{ and \right\}.

\documentclass{article}
\usepackage{makecell,adjustbox}
\usepackage{amsmath} % for '\text' macro
\begin{document} 

\begin{adjustbox}{width = 1\textwidth} 
%\large % why??
% use 'array', not 'tabular', environment:
$\begin{array}{c|c|c|c} 
\hline 
(2,1,1) := 1^1 2^2 & 
(1,2) & 
\left\{    % full-height left-hand curly brace
\text{\makecell[l]{% % process contents of \makecell in text mode
(2 4)(3 5), (1 2)(3 4), (1 5)(3 4), (1 4)(2 5), (1 5)(2 3), \\ 
(1 2)(4 5), (1 3)(2 5), (1 3)(2 4), (1 4)(3 5), (1 2)(3 5), \\ 
(2 5)(3 4), (1 5)(2 4), (1 4)(2 3), (1 3)(4 5), (2 3)(4 5)  }} 
\right\} & % full-height right-hand curly brace
15 \\ 
\hline 
\end{array}$ 
\end{adjustbox} 

\end{document}