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Answer:
15v^5 +4v^3 -24v^2
Explanation:
Distributing the minus sign, we have ...
3v^5 +8v^3 -10v^2 +12v^5 -4v^3 -14v^2
= (3 +12)v^5 +(8 -4)v^3 +(-10 -14)v^2
= 15v^5 +4v^3 -24v^2
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