On 2014–02–09 Jaroslav Hajtmar wrote:

> How can type big integral sign to result looked good?
> 
> Here is my example:
> 
> \startformula
> \int \frac{P_n(x)}{Q_m(x)} \, \mathrm{d}x, \quad n<m
> \stopformula

I don't know how to reduce the space between the integral sign and
the fraction (I assume that's what you meant, by “not looking good”)
except using a manual correction (e.g. \!, or
\edef\int{\int\mskip-10mu}).

As a side note: \mathrm is a font switch, it doesn't take an
argument. Use {\mathrm d}x instead of \mathrm{d}x.

Marco