Answer:
angles 1 4 and 5 are all equal to 113 and angles 2 3 6 and 7 equal 67
So the expression is:

You can combine like terms, which are terms that contain the same variables raised to the same power. That means you can combine the two

.

The other terms can't be combined.
Your final answer should be

.
the answer is 6/13 because 12/26 reduces so the answer is 6/13