energy w/2 policy
(distan* OR online OR virtual* OR remote*) w/5 (educat* OR learn* OR teach*)
robot* w/1 hand OR arm
systematic W/5 review > systematic PRE/5 review, review with a systematic...
heart PRE/0 attack is the same as "heart attack"
(sme OR smes OR smb OR smbs) OR ((small* OR medium*) PRE/3 (business* OR compan* OR enterpris* OR firm* OR corporation*))
systematic PRE/5 review > systematic review, systematic literature review, systematic and critical review, systematic search and scoping review...
Without parentheses, the program performs operations in the following order:
1. OR, 2. W/n and PRE/n, 3. AND, 4. AND NOT.
Parentheses can be used to specify the order of execution - the program always executes the parentheses first
finland or finnish and pisa is the same as (finland or finnish) and pisa
(wind OR solar) AND (power OR energy)
(robot* w/2 hand) OR (robot* pre/3 arm)
