\documentclass{ximera}
\title{This is a TEST by Prof. Choi!}
\author{Youngjun Choi, Ph.D.}
\begin{document}
\begin{abstract}
This is a place to get started.
\end{abstract}
\maketitle
March 30, 2021\\[0.1in]
Here's a sample question. I can math like $2x^3 = 10$.
\begin{problem}
What do you think the answer is?
\begin{multipleChoice}
\choice{Incorrect}
\choice{Not this one!}
\choice[correct]{Click here?}
\choice{Not me!}
\end{multipleChoice}
\end{problem}
\begin{problem}
\begin{multipleChoice}
\choice[correct]{YES!}
\choice{No, no no.}
\end{multipleChoice}
\end{problem}
\begin{problem}
You can test that $x + x = \answer{2x}$
or that $x \cdot x = \answer{x^2}$.
I can do calculations like
\[
\sqrt{\answer{4}} = 2
\]
and
\[
\frac{\answer{1}}{2} = 0.5
\]
\end{problem}
\begin{problem}
Set up the definite integral
\[
\int_{\answer{0}}^{\answer{1}} f(x) \, dx
\]
to evaluate from $0$ to $1$.
\begin{question}
What if $f(x) = \sin x$? Then,
\[
\int_0^1 \sin x \, dx = \answer{-\cos(1) + \cos(0)}.
\]
\begin{hint}
Recall $\int \sin x \, dx = -\cos x + C$.
\end{hint}
\end{question}
\end{problem}
\begin{problem}
The tolerance 17 means $3421 \approx \answer[tolerance=17]{3421}$
\end{problem}
\end{document}