File list (Check if you may need any files):
caculator
.........\计算器
.........\......\simplecalc
.........\......\..........\calc.html
.........\......\..........\Calculator.class
.........\......\..........\Calculator.java
.........\......\..........\lundin
.........\......\..........\......\SymbolicMath
.........\......\..........\......\............\cannotConvertException.class
.........\......\..........\......\............\Derive.class
.........\......\..........\......\............\Eval.class
.........\......\..........\......\............\GUIDerive.class
.........\......\..........\......\............\GUIEval.class
.........\......\..........\......\............\notValidSyntaxException.class
.........\......\..........\Msg.class