Pouvez vous m'aider svp. Merci d'avance (19points)

K = (7 x 10¹² x (10⁻⁷)⁴) / (35 x 10⁻¹⁶)
K = 7/35 x (10¹² x 10⁻²⁸) / 16⁻¹⁶
K = 0,2 x 10⁻¹⁶ / 10⁻¹⁶
K = 0,2 x 10⁻¹⁶⁺¹⁶
K = 0,2 x 10⁰
K = 0,2
K = 2 x 10⁻¹

L = (6 x 10²¹ x (2 x 10⁻⁸)³) / 32 x 10⁻⁶
L = (6 x 2 x 10²¹ x 10⁻²⁴) / 32 x 10⁻⁶
L = 12/32 x (10⁻³) / 10⁻⁶
L = 0,375 x 10⁻³⁺⁶
L = 0,376 x 10³
L = 3,76 x 10²

M = (36 x 10²) / (9 x 10⁴)
M = 36/9 x 10²⁻⁴
M = 4 x 10⁻²

N = (3,2 x 10⁻³ x 5 x (10²)³) / (4 x 10⁻²)
N = (3,2 x 5) / 4 x (10⁻³ x 10⁶) / 10⁻²
N = 16 / 4 x 10³⁺²
N = 4 x 10⁵