Theisen is Annoying

Theisen is making me mad. He is making us show our work. Which would be fine IF THERE WAS ANY WORK TO SHOW! We're learning how to do Formula Mass and he wants us to write the mass of each element in a column and then add them up. And we can't write 4 x O - 16.0. We have to write O - 16.0, O - 16.0, O - 16.0, O - 16.0. With a new line for every comma. So yeah, this is annoying!