Найдите сумму многочленов:
\( \left(7st^{\,2}+12stw^{\,2}+20st^{\,3}+5t^{\,4}w^{\,2}\right)+\left(50s^{\,4}t^{\,4}+24st^{\,2}+19stw^{\,2}+2st^{\,3}\right)=\)
\( =\)\( st^{\,2}\,+\)\( stw^{\,2}+\)\( st^{\,3}+5t^{\,4}w^{\,2}+50s^{\,4}t^{\,4}\)