-(y²+y) +(4y+y²) -16y

To simplify the expression \(-(y^2 + y) + (4y + y^2) - 16y\), we will first distribute the negative sign and then combine like terms.

1. Distribute the negative sign: \[ -y^2 - y + 4y + y^2 - 16y \]

2. Combine like terms:

   • Combine the \(y^2\) terms: \(-y^2 + y^2 = 0\)
   • Combine the \(y\) terms: \(-y + 4y - 16y = -13y\)

Putting it all together, the simplified expression is: \[ -13y \]