What’s the question theirs nothing
X = 105
The circle is 360, so add the two numbers that are already present there together,. The rest two side are the same, so use 2x, x for one side, so two for two side.
85 + 65 + 2x = 360
150 + 2x = 360
2x = 210
x = 105
I'm assuming you mean to list the terms of the expression. Those are mn, -2n, and +8. There are 3 terms there.
To solve this just put a 1 over the 15. So it would be 12/7 + 15/1 which is 16 5/7.