help with dismax query handler syntax

[Luis Neves]

Hello all,
Using the standard query handler I can search for a term excluding a category 
and sort descending by price, e.g.:

http://localhost/solr/select/?q=book+-Category:Adults;Price+desc&start=0&rows=10&fl=*,score

I'm scratching my head on how to do the same with the Dismax query handler, can 
anyone point me in the right direction.

Thanks!

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Luis Neves