Show your working and I'll tell you where you went wrong.
51 - 14 sqrt 2/ 3 -2 sqrt 2 both multiplied by 3+2 sqrt 2. Then I got 153 + 102 sqrt 2 - 42 sqrt 2 - 28 - 2 divided by 9-4-2 which gave me: 123-60 sqrt 2 /3. I divided it by three, which gave me 41 -20 sqrt 20
51 - 14 sqrt 2/ 3 -2 sqrt 2 both multiplied by 3+2 sqrt 2. Then I got 153 + 102 sqrt 2 - 42 sqrt 2 - 28 - 2 divided by 9-4-2 which gave me: 123-60 sqrt 2 /3. I divided it by three, which gave me 41 -20 sqrt 20