Is there some way to type parenthesis () in \num?

[syvshc]

Here I have two demands about this question

1. when negetive number in \numproduct:

\documentclass{article}
\usepackage{siunitx}
\begin{document}
    \numproduct{-4d-2 x (-3)}
\end{document}

2. when I don't want to give the answer straightly:

\documentclass{article}
\usepackage{siunitx}
\begin{document}
    \num{(40-10)d-3}
\end{document}

They raise the same error:

./main.tex:4: Package siunitx Error: Invalid number `()'.

For immediate help type H <return>.
 ...

l.4     \num{(40-10)d-3}

[josephwright]

The first part can be handled by input-ignore, except it turned out there's a bug there: I'll fix shortly, and you'll be able to use

\documentclass{article}
\usepackage{siunitx}
\begin{document}
    \numproduct[input-ignore = (),input-open-uncertainty=,input-close-uncertainty=]
      {-4d-2 x (-3)}
\end{document}

[josephwright]

On the second part, siunitx does not attempt to parse full math mode expressions. Assuming you don't want to treat as an equation, set parse-numbers = false.

[syvshc]

On the second part, siunitx does not attempt to parse full math mode expressions. Assuming you don't want to treat as an equation, set parse-numbers = false.

Sorry I didn't describe my demand clearly, the second part I wang to output

parse-numbers = false will give

It's still not what I want.