I wish that Quest was able to handle more than 2 numbers and an operation at a time.
So, you could go like:
set numeric <NNN;%AAA%+%ZZZ%+%DDF%+%YTYTY%>
Instead of having to go:
set numeric <NNN;%AAA%+%ZZZ>
set numeric <NNN;%NNN%+%DDF%>
set numeric <NNN;%NNN%+%YTYTY%>