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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def dumps(self):
 """Represent the document as a string in LaTeX syntax. Returns ------- str """


        head = self.documentclass.dumps() + '%\n'
        head += self.dumps_packages() + '%\n'
        head += dumps_list(self.variables) + '%\n'
        head += dumps_list(self.preamble) + '%\n'

        return head + '%\n' + super().dumps()