binary_operators_ref	binary_operators_ref
create_tree	create_tree
eval_text	eval_text
eval_tree	eval_tree
find_parenthesis	find_parenthesis
mapping_names_ref	mapping_names_ref
map_ref	map_ref
pval_ref	pval_ref
singular_operators_ref	singular_operators_ref
text_ref	text_ref
tree_ref	tree_ref
valid_functions_ref	valid_functions_ref
