Use getType insead of using to removed valueType in derivative
Use getType insead of using to removed valueType in derivative

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