Найдите сумму многочленов:

\(\displaystyle \left(3u^{\,3}s^{\,2}t-ust^{\,2}+ust+13u\right)+\left(-4ust^{\,2}+11u^{\,3}s^{\,2}t-3ust+7u\right)=\)

\(\displaystyle =\)[?||-][ ]\(\displaystyle u^{\,3}s^{\,2}t\)[?|+|-][ ]\(\displaystyle ust^{\,2}\)[?|+|-][ ]\(\displaystyle ust\)[?|+|-][ ]\(\displaystyle u\)