subtract 2z³-z²+z-3 from the answer of addition of 2z³+4z²+5z+7 and 4z³+2z²-7z-2
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Answer:
2z³+4z²+5z+7 + 4z³+2z²-7z-2
=6z³+6z²-2z+5
6z³+6z²-2z+5-2z³-2z+1z+3
4z³-4z+8-2z
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