Well looked at this and not sure of the task: some X numbers + x some Y numbers?
Like this?
9 x 4 = 36; (7+8+9) +(2+6+4) = 36 ; 5 x 6 + 2 + 4 = 36
(7+8+5) +(2+6+3) = 31
7 + 8 x 6 = 55
8 x (3 + 4) + 6 = 62
I copied the Question verbatim but I agree that its not clear what is needed - it looks complicated but its easy!
Perhaps I've been given a Children's Puzzle pad.
The Moneyless Chicken says:- Use it up, wear it out, make it do or do without.