'Simplest form' expand brackets?

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When a question asks 'write in its simplest form', do I factorise, or expand...? Eg...

$$ \frac{x+10}{(x-4)(x+3)} $$ Or $$ \frac{x+10}{x^2-x-12} $$

Or does it even matter?

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Simplify, in this context, and in your exam, means that the terms must be factorised wherever possible, (with any common factors cancelled), so the first form is correct.