The following image displays two execution groups that can be joined.

Place your cursor in the first execution group (or select both groups) and join the execution groups.  You will then need to execute to refresh the outputs. The following is the result of joining the execution groups and then reexecuting.

Note that when two inputs are in one execution group, the outputs are displayed together.  In this case, the equation label is associated with the last output in the execution group.