[om] Need help to encode one math expression in OpenMath!

[Zheng Wang]

I have difficulty in encoding the following math expression in OpenMath 
. 
                                      3
                                     d        3
                                   ------ (x y  z)
                                        2
                                   dx dy
I could not figure out how to combine nthdiff and partialdiff together. 
Any help will be appreciated.
Thanks.

-- 
Best regards
(Jack)Zheng Wang
Tel:519-635-6678
Email:z3wang at uwaterloo.ca; zwang at orcca.on.ca
Combinatorics & Optimization and Computer Science
Co-op Program  Faculty: Math
University of Waterloo
Canada
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