Найдите пропущенные значения:

\(\displaystyle (-9s^{\,4}t-101t^{\,5}u^{\,7})(7stu+8s^{\,7}tu^{\,9})=\)

\(\displaystyle =\)[?||-][ ]\(\displaystyle (7stu+8s^{\,7}tu^{\,9})\)[?|+|-][ ]\(\displaystyle (7stu+8s^{\,7}tu^{\,9})\)