2﹙b³﹚²×﹙b²﹚⁴－﹙b²﹚的5次方×﹙﹣b⁴﹚

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2﹙b³﹚²×﹙b²﹚⁴－﹙b²﹚的5次方×﹙﹣b⁴﹚2﹙b³﹚²×﹙b²﹚⁴－﹙b²

2﹙b³﹚²×﹙b²﹚⁴－﹙b²﹚的5次方×﹙﹣b⁴﹚
2﹙b³﹚²×﹙b²﹚⁴－﹙b²﹚的5次方×﹙﹣b⁴﹚

2﹙b³﹚²×﹙b²﹚⁴－﹙b²﹚的5次方×﹙﹣b⁴﹚
2﹙b³﹚²×﹙b²﹚⁴－﹙b²﹚的5次方×﹙﹣b⁴﹚
=2b^6 x b^8+b^10xb^4
=2b^14+b^14
=3b^14