You can put this solution on YOUR website! It looks like you are nearly spamming the board with problems. If you need help, then leave a comment or thank you note and I'll send you my email address.
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This problem is actually very simple. We start with (-2 + 7n5 – 6n4)and distribute the negative to the other terms to get -n5+4n4-8
then we combine like terms to get
Notice that the term with the highest exponent is written first and then the other terms are written in decreasing order of their exponents.
