troubleshooting Question

Symbolic Toolbox - extract coefficients for a transfer function

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CDirenziFlag for United States of America asked on
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Given these two lines of code:
>> x = sym('x')
>> expand((x-2)*(x-4))

I will get this back:

Is there an easy way to extract the coefficients of a symbolic polynomial?  Transfer functions, the tf() command, expect only coefficients.  
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