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Verified answer
Del primer inciso encierra la primera resta y la tercera.8 x (2+7) — 8 x 2 + 8 x 7 = 16 + 56 = 72
— 8 x 9 = 72
6 x (6+3) — 6 x 6 + 6 x 3 = 36 + 18 = 54
— 6 x 9 = 54
9 x (9+7) — 9 x 9 + 9 x 7 = 81 + 63 = 144
— 9 x 16 = 144