Question

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Answer 1

http://www.wolframalpha.com/input/?i=%282x^2%E2%88%924x%E2%88%928%29%E2%88%92%285x^2%2B3x%E2%88%922%29
Change the x's back to w's though.

Answer 2

(-3w^-1w-9)

Answer 3

I have to go, but if no one helps you, look at wolframalpha or ask moderators. Usually, people disagree with wolframalpha, but it explains it all.