\documentclass[12pt]{article}
\usepackage{amsmath, amssymb, graphicx, array, fancyhdr, unicode-math, multirow}

\DeclareMathOperator{\Var}{Var}
\DeclareMathOperator{\sd}{SD}
\DeclareMathOperator{\Pois}{Pois}
\DeclareMathOperator{\Bin}{Bin}
\DeclareMathOperator{\NegBin}{NegBin}
\DeclareMathOperator{\sech}{sech}


% Text: Calibri, all bold
\setmainfont{Calibri}
\renewcommand{\seriesdefault}{b}

% Math: choose a math font and visually embolden it
\setmathfont{TeX Gyre Termes Math}                  % base math font
\setmathfont[FakeBold=1.9]{TeX Gyre Termes Math}    % embolden; adjust 1.6–2.4

% header
\pagestyle{fancy}
\fancyhf{}
\lhead{\resizebox{!}{2cm}{B}}
\chead{\raisebox{0.5cm}{\Huge Set Operations}} % (add title text if you want)
\rhead{\resizebox{!}{2cm}{B}}
\setlength{\headheight}{2.5cm}
\setlength{\headsep}{12pt} % space between header and body

\begin{document}
\thispagestyle{fancy}

% -------- PAGE 1 --------
\begin{table}[h!]
  \renewcommand{\arraystretch}{1.2}

  % -------- Single -------------------
  \begin{tabular}{m{1.2in} m{2in} m{2in}}
   \includegraphics[width=1in]{images/single.png} 
     & $\includegraphics[width=2in]{images/pair.png}$ 
     & $\includegraphics[width=2in]{images/triad.png}$ \\
  \end{tabular}



  % -------- Abstract -------------------
\begin{tabular}{m{1.2in} m{4in}}
\multirow{5}{*}{\centering\includegraphics[width=1in]{images/abstract.png}} &
$|X \cup Y| = |X| + |Y| - |X \cap Y| = |U| - |X^{C} \cap Y^{C}|$ \\
& $|X \cap Y| = |X| + |Y| - |X \cup Y| = |U| - |X^{C} \cup Y^{C}|$ \\
& $|A \cup B \cup C| = |A| + |B|+ |C| - |A \cap B| - |B \cap C| - |A \cap C| +|A \cap B \cap C|$ \\
& $|A \cap B \cap C| = - |A| - |B| - |C| + |A \cup B| + |B \cup C| + |A \cup C| +|A \cup B \cup C|$\\
& $|A\cap B| = |A \cap B \cap C^{c}| + |A \cap B \cap C|$\\
\end{tabular}

  % -------- Question -------------------
  \begin{tabular}{m{1.2in} m{4in}}
    \includegraphics[width=1in]{images/question.png} &
    \includegraphics[width=1in]{images/Section_01_K.png} 
   \end{tabular}

\end{table}

\begin{table}[h!]
  \begin{tabular}{m{1.2in} m{4in}}

&$|U| = 110$\\
&$|E| = 75$\\
&$|S| = 52$\\
&$|F| = 50$\\
&$|E \cap F| = 30$\\
&$|F \cap S| = 22$\\
&$|S \cap E| = 33$\\
&$|E \cap F \cap S| = ?  $\\
\end{tabular}
\end{table}
% -------- PAGE 2 --------
\newpage
\thispagestyle{fancy}

\begin{table}[h!]
  \renewcommand{\arraystretch}{1.2}
 % -------- Answer -------------------
  \begin{tabular}{m{1.2in} m{4in}}
    \includegraphics[width=1in]{images/key.png} &
     \includegraphics[width=1in]{images/Section_01_K.png} \\
   \end{tabular}
 % -------- Answer -------------------
\end{table}
 

\begin{table}[h!]
  \begin{tabular}{m{1.2in} m{4in}}
&$|U| = 110$\\
&$|E| = 75$\\
&$|S| = 52$\\
&$|F| = 50$\\
&$|E \cap F| = 30$\\
&$|F \cap S| = 22$\\
&$|S \cap E| = 33$\\
&$|E \cap F \cap S| = |U| - |E| - |F| - |S| + |E \cap F| + |F \cap S| + |S \cap E| = 18$\\
 

\end{tabular}
\end{table}
 
\end{document}