ec 74 Calcule les expressions suivante A = 3-4x (5-2) B = 3 x 4-2 x (4-1) C = 5-2 x 3 +2× 7 D = −3+(1-5) × (- 6) E = 1-2 x 3 + 4 × (-5) F = 1 + (-2)² - (- 3)²​