Order of Operations

I have used an ‘insert the brackets’ type question before but find students can sometimes just wait for the answer to just jump out at them rather than trying to fit in brackets to make the answer work (even if its on a trial an error basis). I like using the same expression so students are more inclined to try a few ideas. After using a similar question to the one below, one of my year 7 class said he had found some answers that weren’t in the cloud so i thought it might be nicer to give them an expression and ask them to find as many different answers as they could by inserting brackets.