Выполните приведение подобных слагаемых в выражении:

\(\displaystyle 16+7z+8z+12+4z+9+3z=\)

\(\displaystyle =\big(\)[ ]\(\displaystyle +\)[ ]\(\displaystyle +\)[ ]\(\displaystyle +\)[ ]\(\displaystyle \big)\,z\,+\)[ ]\(\displaystyle =\)[ ]\(\displaystyle \,z\,+\)[ ]