Multiple Curve | Brep split

Grasshopper
1

I am trying to split two curves with 5 breps. I want to keep the parts that do not fall in the red box.

image
image775×430 29 KB

I can’t figure out how to remove the parts I dont want.

Thank you for any advice.

multiple brep curve split.gh (16.4 KB)

2

Needed to use Trim with Region, not split with region.