public void FormatVisitor_ArithmeticExpression_Can_Be_Formatted()
{
MathExpression expression = MathExpression.Parse("-1+2-3*4/5^6%7");
FormatVisitor visitor = new FormatVisitor();
string format = visitor.Format(expression);
Assert.AreEqual("((-1+2)-(((3*4)/(5^6))%7))", format);
}