import java.util.*;
import java.util.stream.*;
import java.util.regex.*;

class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String text = "12 + (ab-bc*3)";
		List<String> results = Pattern.compile("\\p{Punct}|\\w+").matcher(text)
		    .results()
		    .map(MatchResult::group)
		    .collect(Collectors.toList());
    	System.out.println(results); 
	}
}