2m2n
![RCSB PDB - 2M2N: Structure of [L-HisB24] insulin analogue at pH 8.0](https://cdn.rcsb.org/images/structures/2m2n_chain-B.jpeg "2m2n")
![RCSB PDB - 2M2N: Structure of [L-HisB24] insulin analogue at pH 8.0](https://cdn.rcsb.org/images/structures/2m2n_chain-A.jpeg "2m2n")
![RCSB PDB - 2M2N: Structure of [L-HisB24] insulin analogue at pH 8.0](https://files.rcsb.org/validation/view/2m2n_multipercentile_validation.png "2m2n")
![[题目]计算2m2n﹣3m2n的结果为( )A. ﹣1 B. ﹣5m2n C. ﹣m2n D. 不能合并 题目和参考答案——青夏教育精英家教网——](https://thumb.zyjl.cn/questionBank/Upload/2017/12/28/21/f7f66360/SYS201712282127379508512644_ST/SYS201712282127379508512644_ST.001.png "2m2n")
(2n-m)&line2=%5Cmathrm%7BSolution:%5C:%7D-2m%5E%7B2%7D%2B3mn%2B2n%5E%7B2%7D "2m2n")
 "2m2n")
![[m+n]-2mn+n^2](https://www.symbolab.com/images/latexRender?width=400&height=150&line1=[m%2Bn]-2mn%2Bn%5E%7B2%7D&line2=%5Cmathrm%7BSolution:%5C:%7Dm%2Bn-2mn%2Bn%5E%7B2%7D "2m2n")
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