The `physics package`

has the macros `\dv`

and `\pdv`

which are great but I have a small problem with them.

If an argument with parenthesis included right after them they eat the whole argument. If there is a space in between the argument everything works fine but I want to prevent this happening all together. I checked the documentation but couldn't find a solution. So an example would be

```
\documentclass{article}
\usepackage{physics}
\begin{document}
\[\dv{x}{t}(y^2-5) \qquad \dv{x}{t} (y^2-5) \qquad \dv{x}{t} \]
\end{document}
```

I want the output of the equation on the left to be the same as the middle one.

## Best Answer

That's because

`\dv`

(which is a shorthand for`\derivative`

) is defined asEven if the optional

`g`

-type argument is given (as in your case) the command will scan further for an optional delimited`d`

-type argument which is delimited by`(`

and`)`

(maybe not the best choice in a mathematical context). To circumvent this you have to redefine`\derivative`

to always flush`#5`

if it is present.At the same time I'd like to note that the

`physics`

package does not really help me writing physics formulae and I'm usually much better off typing the stuff by hand using the`amsmath`

macros.