Delete frames from n To n

I would like can delete frames in the middle of animation without use a external software


Delete from the start to a, delete from b to the end.

I want to be able to cut through the middle and keep the beginning and the end

For example between A(38) to B(70)

Try re-zero for the start and then delete the end.

I do not look for a workaround, which by the way does not work, I have already trimmed it in Maya.
But it would be nice to be able to eliminate intermediate frames without leaving Unreal

I like this idea, being able to select what frames you would like to delete like frame 35 to 50 of 100 frames then delete them or copy pasting them so you can modify them to extend an animation so to speak.

Yes, copy pasting will be nice Too

great minds think alike <3