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NEED HELP! Please answer in steps so I can learn how to do it too, thanks so much in advance.

NEED HELP! Please answer in steps so I can learn how to do it too, thanks so much-example-1

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Answer:

So, the simplified expression is
-7t^(5) +9t^(4) -3t^(2) -t+5

Explanation:

NEED HELP! Please answer in steps so I can learn how to do it too, thanks so much-example-1
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