JQL queries could be translated to eazyBI reports using dimensions as page filters and selecting measures to represent issues in the desired context.
For your report, you might want to use Sprint scope measure “Sprint issues completed” that represent issues resolved during the selected sprint (or sprints).
For a detailed measure description, please see the documentation: Jira Software custom fields - eazyBI for Jira.
To filter results only for the last three closed sprints, you might want to use “Sprint” dimension on report pages. In Sprint dimension. define a new calculated member to filter and aggregate only three last closed sprints. The expression might look like this:
This and other calculated member examples you can check out in the eazyBI Demo account: Issues - Jira Demo - eazyBI.
More details on calculated members in dimensions are here: Calculated members in other dimensions - eazyBI for Jira
Zane / support@eazyBI.com