The third and fourth charts represent functions
I believe it would just be -1
Do 12-5 then 6.4 then 2.2 then whatever answer you get for 12-5 multiply it by the answer you get for 6.4 then subtract whatever answer you get for 2.2 hope this helps!
The intersected arc is the arc opposite the angle in question, here arc ABE.
Answer: ABE, last choice