LaTeX Document cuts off

I created a document with sections and subsections and made it a table of contents. There are about twenty sections. However, after the 9th section, a new page doesn’t start, rather it cuts off so I can’t see the rest of the document. I added test text, but it still didn’t work. Does anyone know why this is? Below is my code:

documentclass[12pt]{article}
begin{document}
title{Notes on SAT Math}
maketitle


newpage
tableofcontents

newpage
section{Exponents and Radicals}

subsection{Laws of Exponents}
Here are some of the important Laws of Exponents: 

subsection{Evaluating Expressions with Exponents}

subsection{Solving equations with Exponents}

subsection{Simplifying Square Roots}


section{Percent}
subsection{Percent change}

subsection{Simple and Compound Interest}

subsection{Percent Word Problems}

section{Exponential vs Linear Growth}
subsection{Linear Growth and Decay}
subsection{Exponential Growth and Decay}

section{Proportion}

section{Rates}
subsection{Conversion Factors}

section{Expressions}
subsection{Combining Like Terms} 
subsection{Expansion and Factoring}
subsection{Combining, dividing, and splitting fractions}

section{More Equation Solving Strategies}
subsection{Matching coefficients}
subsection{Clearing denominators}

section{Systems of Equations}
subsection{Substitution}
subsection{Elimination}
subsection{Systems with no and infinite solutions}
subsection{Word Problems}
subsection{More Complex Systems}
subsection{Graphs of Systems of Equations}

section{Inequalities}
subsection{How to Solve Inequalities}
subsection{Inequality Word Problems}
subsection{Graphs of Inequalities}

section{Word Problems}

section{Lines}
subsection{Slope and y-intercept}
subsection{Slope Intercept and Point Slope Form}
subsection{Finding the intersection of two lines}
subsection{Parallel and Perpendicular lines}
subsection{Horizontal and Vertical Lines}

section{Interpreting Linear Models}

section{Functions}
subsection{What is a Function?}
subsection{When are Functions Undefined?}
subsection{Finding the intersection of two lines}
subsection{Parallel and Perpendicular lines}
subsection{Horizontal and Vertical Lines}

section{Quadratics}
subsection{Tactics for Finding the Roots}
subsection{Completing the Square}
subsection{Vertex and Vertex Form}
subsection{Parallel and Perpendicular lines}
subsection{Parallel and Perpendicular lines}

section{Synthetic Division}
subsection{Performing Synthetic Division}
subsection{Equivalent Expressions}
subsection{The Remainder Theorem}

section{Complex Numbers}

section{Absolute Value}

section{Angles}
subsection{Exterior Angle Theorem}
subsection{Parallel Lines}
subsection{Polygons}

section{Triangles}
subsection{Isosceles and Equilateral Triangles}
subsection{Right Triangles}
subsection{Special Right Triangles}
subsection{Similar Triangles}
subsection{Radians}

section{Circles}
subsection{Area and circumference}
subsection{Arc Length}
subsection{Area of a Sector}
subsection{Central and Inscribed Angles}
subsection{Equations of Circles}

section{Trigonometry}
subsection{Sine, cosine, and tangent}
subsection{Trigonometric Identities}
subsection{Evaluating Trigonometric Expressions}

section{Reading Data}

section{Probability}

section{Statistics I}
subsection{Mean, median, mode}
subsection{Range and Standard Deviation}
subsection{Histograms and Dot Plots}
subsection{Word problems involving averages}

section{Statistics II}
subsection{Statistical Sampling}
subsection{Using and Interpreting Line of Best Fit}
subsection{Margin of Error}
subsection{Confidence Intervals}
subsection{Experimental Design and Conclusions}


section{Volume}



end{document}