ADS differential problem!!

hi,all:
you know, the ADS can get the differential of the integrand,like A=diff(B), but the integral variable is default, it can't be changed,does somebody know how to change the integral variable, or is there any ways to solve it?

thank you!

I can't understand what you mean by integrand and integral variable, while you claim "differential problem".

But I think your problem can be solved by using "vs()" function.
See http://edocs.soco.agilent.com/display/ads2009/vs%28%29