Does simple expression support operator precedence by using parenthesis or bracket?

hey guys, does anyone know if the simple expression support operator
precedence by using parenthesis?
Basically, I want to do something like this:

<simple>(${in.headers.h_event} == 'A' and
${in.headers.h_state} == 'AA')
or
(${in.headers.h_event} == 'B'
and ${in.headers.h_state} == 'BB' )
</simple>