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Theorem adas 172
Description: Plus is associative.
Hypothesis
Ref Expression
adas.1 ⊦ (𝜑 ⅋ ((𝜓 ⊕ 𝜒) ⊕ 𝜃))
Assertion
Ref Expression
adas ⊦ (𝜑 ⅋ (𝜓 ⊕ (𝜒 ⊕ 𝜃)))

Proof of Theorem adas
StepHypRef Expression
Colors of variables: wff var nilad
Syntax hints:   ⅋ wmd 2   ⊕ wad 131
 WARNING: This theorem has an incomplete proof.
This theorem is referenced by: (None)
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