Remove the need to have the `Complex` and `Fraction` classes for type checking
Remove the need to have the `Complex` and `Fraction` classes for type checking

josdejong/mathjs,FSMaxB/mathjs,FSMaxB/mathjs,FSMaxB/mathjs,josdejong/mathjs,josdejong/mathjs,josdejong/mathjs,josdejong/mathjs,FSMaxB/mathjs,FSMaxB/mathjs