Add the Polynomials $$\left( 4 w ^ { 2 } + 8 w \right) + \left( 3 z ^ { 2 } - 5 z \right)$$

Add the polynomials. $$\left( 4 w ^ { 2 } + 8 w \right) + \left( 3 z ^ { 2 } - 5 z \right)$$