Simplification.. Am I doing this right?

I'm doing some simplification problems and I'm not sure if I did the following correctly or not:

(Original equation)

**(**(x^3)(y^-5)(z^-7)**)** / **(**(x^-4) + (y^9) - (z^-2)**)**

After doing several methods, I got this:

**(**x^3**)** / **(**(z^7)(y^5) + (z^7)(y^14) - (y^5)**)**

Now, here is the thing. Are there multiple answers to simplification problems? I don't see what I might have done wrong, but here is the answer my calculator gives:

**(**x^3**)** / **(**(z^7)(y^14) - (y^5)(z^5) + ((y^5)(z^7) / (x^4))**)**

It looks like my calculator gives a similar but longer simplification. Perhaps I did an even better simplification?

Any help please? :)