Pouvez vous m’aider svp

B = 14x+7+10-5x = 9x+17

C = n ² - 1/3n + 1/36

D = t ² + 1/2t + 1/16

E = y² - 4/25

F = 16x² - 3x + 9/64

G = 9x² + 21x + 49/4

H = 10/3w - 4/9w² + 25 - 10/3w
H = -4/9w² + 25