Answer:
Points C,D, E and F are coplanar.
Couldn’t quite read everything, the writing is very light. But from what I could read, it was correct for the most part. :)
You can not "solve" this, so to speak, rather simplify this expression. Take the "2" and multiply that by the "a" and the "3" in the parentheses. You will then have the simplified answer of: 2a times 6.
Hope that helps!
