svp aider moi Réduire et ordonner les expressions suivante:
A = a + a
B = b*b
C = 2c + c
D = 2d + d + ad
E = d+d²
F = cb + c²b + a
G = 4 + x +2x -2
H = 2x - x 1 = 2x * x
J = x * x + 2x
K = x -2x -3x
L = (-x) * (-x) ​