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Proof step 3 from proof nds-app (previous step)

∀ gndx1. (gndx + gndx1).nds = gndx.nds + gndx1.nds ⊦ (gndx + gndx1).nds = gndx.nds + gndx1.nds

Heuristic quantifier closing applied rule all left

And closed the goal!

Rule argument

pos: left 1 terms: gndx1

Additional information

Used terms: gndx1