feval(symengine, 'partfrac' command error

how i find the partial fraction of 4/ (((x - 7)^2 + 4^2 )* (x^2+14x + 65))

I used the following command but it gave a error.

 feval(symengine, 'partfrac', 4/ (((x - 7)^2 + 4^2 )* (x^2+14x + 65)))
 feval(symengine, 'partfrac', 4/ (((x - 7)^2 + 4^2 )* (x^2+14x + 65)))
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Error: Unexpected MATLAB expression.

[yassine]

(x/455 + 2/65)/(x^2 + 14*x + 65) - (x/455 - 2/65)/(x^2 - 14*x + 65)

multplication * omise 14*x

Answer 1

[Thomas]

You forgot the * between 14 and x

 feval(symengine, 'partfrac', 4/ (((x - 7)^2 + 4^2 )* (x^2+14*x + 65)))