Bonjour,

(-2-5)³ = (-7)³ = -343

-2 - 5³ = -2 - 125 = -127

(-2)³ + (-5)³ = -8 - 125 = -133

2⁻¹ - 5⁻¹ = 1/2 - 1/5 = 5/10 - 2/10 = 3/10

4 × (6 - 3)² = 4 × 3² = 4 × 9 = 36

(6 - 7)⁵ = (-1)⁵ = -1

(25 - 3 × 4)⁴ = (25 - 12)⁴ = 13⁴ = 28 561

5 + (3 - 7)² = 5 + (-4)² = 5 + 16 = 21

(10 + 2 × 5²)² = (10 + 2 × 25)² = (10 + 50)² = 60² = 3 600

2³ × 5 - 10² ÷ 50 = 8 × 5 - 100 ÷ 50 = 40 - 2 = 38

(-5)² × 2 - 8² ÷ 4² = 25 × 2 - 64 ÷ 16 = 50 - 4 = 46

(3/4 - 2/3)² = (9/12 - 8/12)² = (1/12)² = 1/144

3/4 - 2²/3 = 3/4 - 4/3 = 9/12 - 16/12 = -7/12