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办美国文凭加拿大文凭澳洲文凭英国文凭学位证毕业证成绩单
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0 02 05 c0d13bfe3aef0303e7af9c00e67e8a94f1807e25c74b4d5eefb72531c3a418c6 204a9459565a8769
![If A= [[2,3],[4,5]], B= [[3,4],[7,2]], C= [[1,0],[0,7]], then verify that (AB) C = A (BC).](http://i.ytimg.com/vi/E2p69vSffkQ/mqdefault.jpg "If A= [[2,3],[4,5]], B= [[3,4],[7,2]], C= [[1,0],[0,7]], then verify that (AB) C = A (BC).")