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0 4. Verifică egalităţile: a) (17+4 × 2): (121: 11-2 × 3) = 5 b) 3 +2× {14-3x [(19-3 × 5):2]}:8=0 c) 4+3 × (3 x 3 +72:2) = 3 d) 642 (7 x 7+8 x 9) + 3x 8 = 545.
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