How do you simplify # 1/4 div 11/12 div 3/4#?
Just to emphasis a point write as:
The shortcut way to deal with this is to invert (turn upside down) and then multiply.
The only purpose of the brackets is to differentiate between the values and the 'operation' applied to them.
I am using the term 'operator' to mean the 'actions' of:
add; subtract; multiply; divide and so on