public void ArithmaticTestsMethod4()
        {
            Arithmatic solver = new Arithmatic("((2*2)+1)");

            string result = solver.Solve();

            Assert.AreEqual(result, "5");
        }
        public void ArithmaticTestsMethod5()
        {
            Arithmatic solver = new Arithmatic("((1+1)+((1+1)+(1+1)))");

            string result = solver.Solve();

            Assert.AreEqual(result, "6");
        }
        public void ArithmaticTestsMethod2()
        {
            Arithmatic solver = new Arithmatic("(1+2)");

            string result = solver.Solve();

            Assert.AreEqual(result, "3");
        }