Answers in bold
It's not a typo that the answers are the same for each.
Step-by-step explanation:
There's not much to do for part b. The notation 6 * x can be shortened to 6x. The same can be said when going from 6*x*y to 6xy
For part c, the 2 and 3 multiply to 6. We end up with the same exact identical thing as part b. We leave the x and y as they are.