Rewrite as .

Factor out of .

Rewrite as .

Add parentheses.

Pull terms out from under the radical.

Multiply by .

Rewrite as .

Factor out .

Rewrite as .

Reorder and .

Add parentheses.

Pull terms out from under the radical.

Add and .

Combine -z^2 fifth root of 2048z+4 fifth root of 2z^11