void80

Left hand side of subtraction misinterpreted as cast

6

Have a look at the following test cases ``` [TestMethod] [DataRow("#1", "a1", 1)] [DataRow("#2", "(a1)", 1)] [DataRow("#3", "(a1)+(a1)", 2)] [DataRow("#4", "(a1)+a1", 2)] [DataRow("#5", "(a1)-(a1)", 0)] [DataRow("#6", "(a1)-a1", 0)] public void...