Question
I baught a king crimson maple tree and broke branches getting into my van should i cut them off? they broke right in the middle of the branch. Will these branches grow back?

Answer
If the lower branches are hitting the van I would prune the branches so there is easy access to the van. Prune them back to the trunk of the tree. The branch collar grows from the stem tissue around the base of the branch. Make pruning cuts so that only branch tissue (wood on the branch side of the collar) is removed. Be careful to prune just beyond the branch collar, but DON扵 leave a stub. If the branch collar is left intact after pruning, the wound will seal more effectively and stem tissue probably will not decay.
No these will not grow back. Here is a web site that describes how to prune trees.  http://hort.ifas.ufl.edu/woody/pruningcuts.html