Sample Code

\documentclass{article}

\usepackage{graphicx} % Required for inserting images

\usepackage{amsmath, amssymb, amsthm}

\title{Insert title}

\author{Name here}

\date{Due date here}

\begin{document}

\maketitle

\section*{Section 1.2}

\begin{enumerate}

    \item[5.] Type question 5

    \begin{proof}

        The set of real numbers is written as $\mathbb{R}$.

        The set of natural number is written as $\mathbb{N}$.

        The set of integers is written as $\mathbb{Z}$.

        The set of rational numbers is written as $\mathbb{Q}$.

        Let $A,B$ be sets. We write the union of $A,B$ as $A\cup B$. We write the intersection of $A,B$ as $A\cap B$. $A$ is a subset of $B$ is written as $A\subset B$. $A$ is not a subset of $B$ is written as $A \not\subset B$.

        If $x$ is an element of $A$, then we can write $x\in A$. If $x$ is not an element of $A$, then we can write $x\notin A$ or $x\not\in A$.

        blah blah blah blah

        \[\alpha, \beta, \kappa, \lambda\]

        blah blah blah

        \[a = b = c \leq d\]

        blah blah

        \begin{align*}

            a &\implies b\\

            &= c\\

            &\leq d

        \end{align*}

        blah blah

        \[x\in A\cup B \implies x\in A \text{ or } x\in B\]

        % comment

    \end{proof}

    \item[7.] Type question

    \begin{proof}

    \end{proof}

    \item[8.] Type question

    \begin{proof}

    \end{proof}

\end{enumerate}

\section*{Section 1.3}

\begin{enumerate}

    \item[2.] 

    \item[4.] 

    \item[5.] 

\end{enumerate}

\end{document}