def combineFunctions(self, functions):
        """ generates a combined formula as used for the calculation
            @param functions the list of individual functions (lambda code)
            @return the combined formula
            @note out of scope is the simplification (like: (x+1)+1 => x+2)
        """
        expression = ""
        for function in reversed(functions):
            match = re.match(".*\((?P<expression>lambda.*)\).*", inspect.getsource(function))
            if match:
                functionCode = match.group("expression")
                functionCode = functionCode[functionCode.find(":")+1:].strip()
                if not len(expression):
                    expression = functionCode
                else:
                    expression = expression.replace("x", "("+functionCode+")")
        return expression
 generates a combined formula as used for the calculation
            @param functions the list of individual functions (lambda code)
            @return the combined formula
            @note out of scope is the simplification (like: (x+1)+1 => x+2)
        
recipes/Python/578061_Sequence_Builder/recipe-578061.py