On Mon, 28 Jan 2013, Otared Kavian wrote:
Hi Janne,
Personnally I prefer to use the Plain TeX alternative \over (which works fine in ConTeXt), that is ${a \over b}$ instead of $\frac{a}{b}$
Compare the following two outputs in the example you want to typeset: I think the second is more or less what you want
\starttext Using \type{\frac} gives: \startformula f_{B_t | B_s = S, B_u = U}(x) = \frac{e^{-\frac{(u-s)x^2 - 2x(S(u-t) + U(t-s)) + \frac{(S(u-t) + U(t-s))^2}{(u-s)}}{2(t-s)(u-t)}}}{\sqrt{2\pi\frac{(t-s)(u-t)}{u-s}}} \stopformula
Formatting and temporary macros (I usually use \1 \2 etc) make a huge difference in readability: \startformula \def\1 {\frac{ (u-s)x^2 - 2x(S(u-t) + U(t-s)) + \frac{(S(u-t) + U(t-s))^2} {(u-s)} }{ 2(t-s)(u-t)} } % f_{B_t | B_s = S, B_u = U}(x) = \frac { e^{\1} } { \sqrt{2\pi\frac{(t-s)(u-t)}{u-s}} } \stopformula
\blank Using \type{\over} gives: \startformula f_{B_t | B_s = S, B_u = U}(x) = { e^{-{(u-s)x^2 - 2x(S(u-t) + U(t-s)) + {(S(u-t) + U(t-s))^2 \over (u-s)} \over 2(t-s)(u-t)}} \over \sqrt{2\pi {(t-s)(u-t) \over u-s}}} \stopformula
\stoptext
At some stage, we also need to look at nath's automatic conversion of display fractions to inline fractions (e.g., in the numberator \frac{ (S(u-t) + U(t-s))^2 } { (u-s) } should be typeset as (S(u-t) + U(t-s))^2/(u-s) because it is being typeset in \scriptstyle. Aditya