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HELP me with these 2 probs. (7x^4+9x)-2(x^4+13) and (6-t-t^4)+(9t+t^4) Find each sum or difference by combining the parts that are alike.?

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  • HELP me with these 2 probs. (7x^4+9x)-2(x^4+13) and (6-t-t^4)+(9t+t^4) Find each sum or difference by combining the parts that are alike.?


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