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import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;

public class Solution {
    public int solution(String my_string) throws ScriptException {
        ScriptEngineManager mgr = new ScriptEngineManager();
        ScriptEngine engine = mgr.getEngineByName("JavaScript");

        int answer = (int)engine.eval(my_string);
        return answer;
    }
}