The dude above me is wrong lol
Answer:
Hi! The answer is 9.7 / n :)
I do not know the answer but download the app called Photomath and it will give you the answer
You can only add exponents if you are multiplying two of the same variable together. For example,

You take them away if you are dividing.
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In a polynomial equation, you can add together two of the same variable if they have the same exponent
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Or you can take them away in a similar fashion,
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But you cannot add two (or more) different exponents,
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(it does not get any simpler)
I hope this has answered your question, if not, leave a comment and I'll update the answer.
Hexagon has six edges. The figure you're trying to figure out is hexagon I guess.