Inserting large curly/square brackets in an equation!

Hello MaskusKit ,

while I have never used equations before in Word, I looked into what Word offers. This reply is more searching then answering, so bear with me - we both might learn something :-).

If you go to the Insert ribbon, there is the Symbol menu with Equation. Once you click on this, a new filed with a new on-deman ribbon will appear, called "Equation". There is the "Structure" menu, under which you find "Bracket". There is a handfull of options, including large curly brackets. From what I have tried, this is what you need.

I kind'a think you've tried that, but on the other hand - if you had, you would have found the same thing like me. 

So, does this help or not?

I attach what I reproduced: