質問: `a=[{:(3,-4),(1,1),(2,0):}]andb=[{:(2,1,2),(1,2,4):}]`, then verify that `(ba)^(2)neb^(2)a^(2)`. `a=[{:(3,-4),(1,1),(2,0):}]andb=[{:(2,1,2),(1,2,4):}]`, then verify that `(ba)^(2)neb^(2)a^(2)`.
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