Вынесите общий множитель и разложите на множители:

\(\displaystyle 84z^{\,4}-56z^{\,10}-112z^{\,2}+24z^{\,15}-36z^{\,9}+48z^{\,7}=\)

\(\displaystyle =\)[ ]\(\displaystyle \big(\)[ ]\(\displaystyle \big)\big(\)[ ]\(\displaystyle \big)\)