crop animation.

i have animation track with 2000 frames and i need to cut out of it 4 animations. I dont seem to find how to do it. 3ds max/motionbuilder

The beginning of this documentation shows you how to edit/remove frames in UE4 itself:
https://docs.unrealengine.com/latest/INT/Engine/Animation/AnimHowTo/AimOffset/index.html

Yes but i have to edit animations, and make them seamless.