\label{Formula_Answers}
If the answer to your LON-CAPA problem is
\begin{quote}
\[2x^{2}+6x+\frac{4}{3}\]
\end{quote}
You can enter any of the following:
\begin{itemize}
\item \begin{verbatim}2x^2+6x+4/3\end{verbatim}
\item \begin{verbatim}2*x^2+6*x+4/3\end{verbatim}
\item \begin{verbatim}2(x^2+3x+2/3)\end{verbatim}
\item or any other expression that is equivalent to the answer
\end{itemize}

However, if the answer to your LON-CAPA problem has more than one
variable, such as the following:
\begin{quote}
$2xy+3x$
\end{quote}
You will need to enter the {*} for all implied multiplication, for
example:
\begin{itemize}
\item\begin{verbatim}2*x*y+3*x\end{verbatim}
\item\begin{verbatim}x*(2*y+3)\end{verbatim}
\end{itemize}
The computer can figure out that 2x is 2{*}x because it is a number
times a letter, but it can't tell if xy is a two letter variable or
if it is x{*}y. Also, it is unclear if {\tt exp} is meant to be
the exponential function or e{*}x{*}p.

If your answer is:
\begin{quote}
\[\sqrt{4x}\]
\end{quote}
enter the following as your answer:
\begin{itemize}
\item\begin{verbatim}sqrt(4x)\end{verbatim}
\item\begin{verbatim}2sqrt(x)\end{verbatim}
\item\begin{verbatim}2*sqrt(x)\end{verbatim}
\end{itemize}
Note that LON-CAPA expects expressions, not equations. So
\begin{verbatim}y=x^2\end{verbatim}
would not be recognized.