Proof: Multiply Reorder 2

Let's prove the following theorem:

(a ⋅ b) ⋅ c = (b ⋅ c) ⋅ a

Proof:

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Proof Table
# Claim Reason
1 a ⋅ b = b ⋅ a a ⋅ b = b ⋅ a
2 (a ⋅ b) ⋅ c = (b ⋅ a) ⋅ c if a ⋅ b = b ⋅ a, then (a ⋅ b) ⋅ c = (b ⋅ a) ⋅ c
3 (b ⋅ a) ⋅ c = (b ⋅ c) ⋅ a (b ⋅ a) ⋅ c = (b ⋅ c) ⋅ a
4 (a ⋅ b) ⋅ c = (b ⋅ c) ⋅ a if (a ⋅ b) ⋅ c = (b ⋅ a) ⋅ c and (b ⋅ a) ⋅ c = (b ⋅ c) ⋅ a, then (a ⋅ b) ⋅ c = (b ⋅ c) ⋅ a

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