Merci de m'aider SVP

Bonsoir,

A = 9q² x 7
A = 63q²

B = -4 x 4g
B = -16g

C = -a x a
C = -a²

D = -4z² - 4z²
D = -8z²

E = -9q² x 8
E = -72q²

F = 7h² x 1
F = 7h²

Bonne soiree