The Additive/Multiplicative Grammar
A -> P
{ Ô+Õ P }
P -> V { Ô*Õ V }
V -> a|b|c|d|e|f|g|h|i|j|k|l|m
P -> V { Ô*Õ V }
V -> a|b|c|d|e|f|g|h|i|j|k|l|m
|n|o|p|q|r|s|t|u|v|w|x|y|z
A ->
V { '+' V }
V ->
a|b|c|d|e|f|g|h|i|j|k|l|m
|n|o|p|q|r|s|t|u|v|w|x|y|z
Additive
Additive and
Multiplicative
Construct methods by analogy.