public void AddMultSigns_RootAfterPiInsertsAsterix()
        {
            var equation = "155315(#@(14)(37^3))";
            var expected = "155315*(#*@(14)*(37^3))";

            var actual = Standardizer.AddMultSigns(equation);

            Assert.AreEqual(expected, actual);
        }
        public void AddMultSigns_ClosingBracketBeforeOpeningBracketInsertsAsterix()
        {
            var equation = "(14-8)(6+7)+9";
            var expected = "(14-8)*(6+7)+9";

            var actual = Standardizer.AddMultSigns(equation);

            Assert.AreEqual(expected, actual);
        }
        public void AddMultSigns_PiAfterNumberAndBracketInsertsAsterix(string equation, string expected)
        {
            var actual = Standardizer.AddMultSigns(equation);

            Assert.AreEqual(expected, actual);
        }