/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
			String s1 = "<#if (${val1}-${val2}) + ${f1(${a}+${b}*${c})} > 2000>ABC<#elseif ${n1}+${n2}* ${f1(${n3}-${n4})} < 500>DEF</#if>";
		    String m1 = s1.replaceAll("(?<=if \\(|elseif )\\$\\{([^}]*)\\}([+-])\\$\\{([^}]*)\\}", "$1$2$3");
			String m2 = m1.replaceAll("\\$\\{(f1[^)]*\\))\\}", "$1");
		   System.out.println(m2);
	}
}

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