We are using the Tactile Guidelines for the project we are working on, The Common Core National Standards. We also looked at the example you are talking about and this situation is not exactly an equation because there are no comparison and computation symbols used. They are using just the words. That is why were looking for direction about this. We have received materials that are being done by an agency that are experts in this situation and when an equation was used they did not use the tactile box. The shape indicator was used. I am wondering if this is done only in a testing situation.