Выполните приведение подобных слагаемых в выражении:

\(\displaystyle 19k+12+13k-9+k+7+9k-10=\)

\(\displaystyle =\big(\)[ ]\(\displaystyle +\)[ ]\(\displaystyle +\)[ ]\(\displaystyle +\)[ ]\(\displaystyle \big)\,k+\,\)[ ]\(\displaystyle =\)[ ]\(\displaystyle \,k+\,\)[ ]