\documentclass[a4paper, 12pt]{article}
\usepackage{amsfonts}
%\usepackage{amsbsy}
\usepackage{amssymb}
\usepackage{amsmath}
%\usepackage[a4paper, total={6in, 8in}]{geometry}
\usepackage{graphics}
%\usepackage{epsfig}
\usepackage{tgbonum}
\usepackage{tikz}
\usepackage{flexisym}
%\usepackage{subfigure}
\usepackage{cite}
\usepackage{nth}
\usepackage{amsthm}
\usepackage{enumitem}
\usepackage[a4paper, total={6.25in, 9in}]{geometry}
\usepackage{mathtools}
%\documentclass[a4paper, 12pt]{article}
\usepackage{amsfonts}
\usepackage{tikz}
\usepackage{amsmath}
\begin{document}
$$L\left(\Gamma_{(k,2k)};x\right)=\Psi(L(G_1))\Psi(L(G_2))-\Psi(L(G_1))\Psi(L_4(G_2))-\Psi(L(G_2))\Psi(L_3(G_1))=x(x-1)^{(6k-2)} \times\bigl(x^3-(3k+5)x^2+(2k^2+8k+7)x-(3+3k) \bigr)\times \bigl(x^2-(k+3)x+2\bigr)\bigl(x^2-(2k+4)x+1 \bigr)$$
\end{document}
I am trying to write this code in latex. But it does not fit in the page. How to do this?
答案1
\documentclass[12pt]{article}
\usepackage{mathtools}
\usepackage{amssymb}
\usepackage[showframe,
a4paper, total={6.25in, 9in}]{geometry}
\begin{document}
\begin{align*}
L\left(\Gamma_{(k,2k)};x\right)
& = \Psi(L(G_1))\Psi(L(G_2))-\Psi(L(G_1))\Psi(L_4(G_2))-\Psi(L(G_2))\Psi(L_3(G_1)) \\
& = x(x-1)^{(6k-2)} \times\bigl(x^3-(3k+5)x^2+(2k^2+8k+7)x-(3+3k) \bigr) \\
&\qquad \times \bigl(x^2-(k+3)x+2\bigr)\bigl(x^2-(2k+4)x+1 \bigr)
\end{align*}
\end{document}
注意：有些包你加载两次，mathools就会被取代amsmath，所以你不需要amsmath再次加载，字体也是如此：amssymb也要加载amsfonts...