See: <a href="/doc/reference/classes/ucalc.tokens/add/add-string,-tokentype,-string,-int,-regexgrammar,-int/">Add(string, TokenType, string, int, RegExGrammar, int)</a>, <a href="/doc/reference/classes/ucalc/expressiontokens-=-[tokens]/">ExpressionTokens = [Tokens]</a>, <a href="/doc/reference/classes/ucalc/tokentransformer-=-[transformer]/">TokenTransformer = [Transformer]</a>