If it's something like a fraction on a fraction definitely... but don't waste time factorising etc. unless it's absolutely necessary.(Original post by madnessismything)
This is not really about a hard question but more about how to answer the question, if you have to differentiate an equation should you leave it unsimplified or simplified because some years they accepted both but some years wanted simplified or unsimplified but it doesn't mention in the actual question whether you should or not???
Sorry if that didn't make any sense
AQA AS Core 1