Prefix....... forms


What is the prefix form of the below expression?


The answer is:
The only thing to take care was : + is superior to -
In every bracet, change the form to prefix form and do this for basic elementary brackets (like: (d-e) to (-de) and (f+g-h) to (-+fgh)), then brackets outside the smaller brackets (like: ((-de)/(-+fgh)) to (/(-de)(-+fgh)) and so on.And at the end, remove all the brackets.