`3)`

`(-\sqrt{47})/5 . 2 2/3-(\sqrt{1 2/5})^2 . (\sqrt{4})/(-\sqrt{9})`

`=(-\sqrt{47})/5 . 8/3-1 2/5 . (-2/3)`

`=(-8\sqrt{47})/15-7/5 . (-2/3)`

`=(-8\sqrt{47})/15+14/15`

`=(-8\sqrt{47}+14)/15`

`4)`

`3 1/3 . (-4)/9+(\sqrt{100})/3 . \sqrt{169/(9^2)}-1/3:\sqrt{1/16}`

`=10/3 . (-4)/9+10/3 . 13/9-1/3 .4`

`=10/3 . (-4/9+13/9)-4/3`

`=10/3 . 1-4/3`

`=10/3-4/3`

`=2`