Math question, how to do this?

[Mohammad Reza Danesh]

I'm trying to get summation indexes in right position (please see the attached
.pdf and .lyx files). Looks like lyx is making mistake on interpreting index
positions when its combined with fractions. Can anyone on list confirm this or
let me know if there is work around for it?

Thanks,
-Mohammad

test.lyx

test.pdf