input: Write a python function to create a class MyClass that accepts multiple arguments and returns a string representation of the instance.
  assert str(MyClass(1, 2, 3)) == 'MyClass(1, 2, 3)'
  assert str(MyClass('a', 'b', 'c')) == 'MyClass(a, b, c)'
  assert str(MyClass(10, 'test', 5.5)) == 'MyClass(10, test, 5.5)'
output: def MyClass(*args):
      class _MyClass:
          def __init__(self, *args):
              self.args = args
          
          def __str__(self):
              return f"MyClass({', '.join(map(str, self.args))})"
      
      return _MyClass(*args)