Brep Subtraction

Hi all!

Sorry if it is a silly question but my brain stuck.
I have 2 breps that consist of a number of rectangles boxes. How can I take the brep sum which takes out of the subtraction of Brep_3 - Brep_2? (1.0 MB)

Thank you!

Like this? (2.1 MB)

Exactly…Thank you HS_Kim…

Sorry… this one is better…:wink: (2.1 MB)

2 versions better than 1…Thank you!