\iffalse …. \fi

\usepackage{rotating}

\begin{sidewaystable}
\begin{tabular}...\end{tabular}
\end{sidewaystable}

\rm command is used to create right angled bracket.

$${\rm something}(x+something)$$

$${\rm something}(x + something)$$

\begin{command}{x}，这里的{command}有三个命令选项： sideways, turn, rotate。{x}

\usepackage{rotating}         %用于旋转对象

\begin{sideways}将要打印的内容旋转90度\end{sideways}
\begin{turn}{45}将要打印的内容旋转自定义角度\end{turn}
\begin{rotate}{120}将要打印的内容旋转自定义角度，但是旋转结果并不能保证被旋转对象所需要的空间\end{rotate}

\usepackage[colorlinks, citecolor=red]{hyperref}
\usepackage[colorlinks, linkcolor=red, anchorcolor=blue, citecolor=green]{hyperref}