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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 in_global_expression(self):
 """Currently inside an expression"""

        return (self.parenthesis_count == 0 and self.curly_bracket_count == 0
                and self.square_bracket_count == 0
                and not self.in_single_quote and not self.in_double_quote)