Hello,
I found an intermediate solution but I find that the ' is too high.

\m{f^{\prime}(x)=2x}

Fabrice

Le sam. 11 juil. 2020 à 12:46, Fabrice Couvreur <fabrice1.couvreur@gmail.com>
a écrit :

> Hello,
> I am now using the lmtx engine and I have found that using the Pagella
> font the writing of derived functions is not very nice with the symbol '.
> Thank you.
> Fabrice
>
> \setupbodyfont [pagella,11pt]
> \starttext
> \startitemize[n]
>   \startitem
>     \math{f'(x)=x²+4x+4}
>   \stopitem
>   \startitem
>      \math{f''(x)=2x+4}
>   \stopitem
> \stopitemize
> \stoptext
>