Задание

Найдите разности одночленов:

\(\displaystyle 91z^{\,7}-153z^{\,7}=\) [ ]\(\displaystyle z^{\,7}\)
\(\displaystyle 19x^{\,12}-(-3)x^{\,12}=\) [ ]\(\displaystyle x^{\,12}\)
\(\displaystyle (-21)w^{\,51}-14w^{\,51}=\) [ ]\(\displaystyle w^{\,51}\)
\(\displaystyle (-71)t^{\,5}-(-100)t^{\,5}=\) [ ]\(\displaystyle t^{\,5}\)