\documentclass[a4paper, 12pt]{article} \usepackage{amsmath} \usepackage{amssymb} \usepackage[T1]{fontenc} \usepackage{graphicx} \DeclareUnicodeCharacter{202F}{\,} \begin{document} \title{Solutions to Math Exercises} \author{Yao Zhao \\ University of Wisconsin-Madison} \maketitle 1.a. slope = $-\frac{2}{5}$ \\ 1.b. slope = undefined (infinity) \\
The first line (1.a. slope) is indented, which is not desired. How to avoid such problem?
Many thanks in advance!