$-4+4-\frac{ 7 }{ 15 }+\sqrt{ \frac{ 49 }{ 225 } }$
Evaluate the square root$-4+4-\frac{ 7 }{ 15 }+\frac{ 7 }{ 15 }$
Since two opposites add up to $0$, remove them from the expression$-\frac{ 7 }{ 15 }+\frac{ 7 }{ 15 }$
The sum of two opposites equals $0$$0$