Before I really want to ask for WorldEdit, I wanted to mention there are 2 places need to be done. Thanks!
In-game name: Kingyyyy
First position coordinates: -2785 68 5968
Second position coordinates: -2864 6 5983
What to do? (clear, fill, move): There are total of 5 chunks here, I need a fill (regen), ignore the built house, we dont need them.
First position coordinates: -2832 88 5920
Second position coordinates: -2818 5 5935
What to do? (clear, fill, move): This is one chunk, also fill (regen)