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Delimiters Curly Braces Square Brackets

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\Huge Font

\huge
\LARGE
\Large
\large
\normalsize (default)
\small
\footnotesize
\scriptsize
\tiny

\usepackage{nopageno} No page numbering


$\alpha, \beta, \gamma, \psi, \phi$
$$\envert{x-x_0}<\epsilon ~\text{for all}~
n\geq n_0.$$

\envert{x} Absolute value (enclose vert-bar sizes)


\envert[0]{x}
\envert[1]{x}
\envert[2]{x}
\envert[3]{x}
\envert[4]{x}
likewise
\enVert{x} for all sizes (norms)
$$ \enVert[2]{x} $$
\del[2]{x} delimiters Norm
\cbr[2]{x} curly braces Delimiters (parentheses)
\sbr[2]{x} square brackets

dx
\dif x DX
\Dif X
\od{f}{x}
\od[2]{f}{x}
Likewise
\pd[2]{f}{x}
(\usepackage{commath})
\md{f}{5}{x}{2}{y}{3}
\begin{gather*}
a + b = c \\
a = c - b
\end{gather*}

\begin{align*}
a + b &= c \\
a &= c - b
\end{align*}
Note: * is used to avoid numbering
\begin{figure}[h!] Inserting figure
\centering
\includegraphics[width=0.3\textwidth]{fig-517}
\caption{}
\end{figure} Note: to erase figure no., just erase caption

\begin{wrapfigure}{r}{0.3\textwidth} Wrapping figure right/lef


\begin{center} \usepackage{wrapfig}
\includegraphics[width=0.3\textwidth]{fig- \usepackage{lipsum}
518}
\end{center}
\caption{}
\end{wrapfigure}
\begin{figure}[h!] Two figures in a row
\begin{minipage}[b]{0.4\linewidth}
\centering
\includegraphics[width=\linewidth]{fig-528-1}
\caption{}
\label{fig:chapter001_dist_001}
\end{minipage}
\hspace{1cm}
\begin{minipage}[b]{0.4\linewidth}
\centering
\includegraphics[width=\linewidth]{fig-528-2}
\caption{}
\label{fig:chapter001_reward_001}
\end{minipage}
\end{figure}
$$ g(x) = \lef \{
\begin{array}{l}
a_\frac{(n+1)}{2}, ~n ~\text { is odd},\\
b_\frac{n}{2},\hspace{0.65cm} n~\text { is even},
\end {array} \right. $$
$ \begin{array}{r | r r} Slashbox
\mbox{\backslashbox{Column}{Row}}& \frac 1 2 &
-\frac 1 2 \\ \hline
\frac 1 2 & a & b \\
-\frac 1 2 & c & d
\end{array} $
\usepackage{slashbox,booktabs,amsmath}
$ \begin{array}{c | c c c}
\mbox{\backslashbox {\text{Friends}}
{\text{Flavours}}}& \text{Pineapple} & \text{Strawberry} &
\text{Vanilla} \\ \hline
\text{Aslam} & 3 & 1 & 2 \\
\text{Babar} & 2 & 2 & 2 \\
\text{Chishti} & 2 & 1 & 3 \\
\end{array} $
\begin{center}
$ \begin{array}{c|ccc}
&a&b&c\\
\hline
a&m&m&m\\
b&n&m&m\\
c&n&n&m\\
\end{array} $
\end{center}
\section{}
$ \lef[\begin{array}{cccc}
1&a&b&c\\
a&m&m&m\\
b&n&m&m\\
c&n&n&m\\
\end{array} \right]$
$$\prod\limits_{i=1}^{n}i$$
$$ \sum\limits_{i=1}^{n}a_i^2 $$
$$ \int\limits_a^bf(x)dx $$

$$\binom{n}{r}$$

``Thanks!"

\begin{enumerate}[label=(\arabic*)] Numbering [label=(\roman*)]


\item this is a point [label=(\alph*)]
\item Second item
\item Third item
\end{enumerate}
\hrule ( \usepackage{lipsum}) Horizontal line
\begin{document}
$ \begin{array}{c|c|c|c|c}
&A&B&C&D\\
\hline
1.&\encircle{}&\encircle{}&\encircle{}&\encircle{}\\
\hline

2.&\encircle{}&\encircle{}&\encircle{}&\encircle{}\\
\hline

3.&\encircle{}&\encircle{}&\encircle{}&\encircle{}\\\hline

4.&\encircle{}&\encircle{}&\encircle{}&\encircle{}\\\hline

5.&\encircle{}&\encircle{}&\encircle{}&\encircle{}\\\hline

6.&\encircle{}&\encircle{}&\encircle{}&\encircle{}\\\hline

7.&\encircle{}&\encircle{}&\encircle{}&\encircle{}\\
\end{array} $
f
f

1 a1
2 a2
3 a3

A B A B
N

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