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From module Algebra Basics
The operation ⊗\otimes⊗ is defined for all nonzero numbers by a⊗b=a2ba\otimes b=\frac{a^{2}}{b}a⊗b=ba2. Determine [(1⊗2)⊗3]−[1⊗(2⊗3)][(1\otimes 2)\otimes 3]-[1\otimes (2\otimes 3)][(1⊗2)⊗3]−[1⊗(2⊗3)].
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