Update Functions.cs

src/Computer.V2.Lib/Functions.cs

@@ -72,7 +72,7 @@ private static int HighestPow(ref string expression)
                     var tmpStr = Regex.Match(matches[i].Value, @"((?<=\^)((\-)?\d+([\.]\d+)?))").Value;
                     //throws format error if the number is not whole and positive.
                     if (tmpStr == "") continue;
-                    var tmp = int.Parse(tmpStr);
+                    var tmp int.Parse(tmpStr);
                     if (tmp < 0)
                         throw new FormatException();
                     if (tmp > pow)