Найдите разность многочленов:

\(\displaystyle \left(12x^{\,3}+7x^{\,2}+20x+74\right)-\left(6x^{\,3}+3x^{\,2}+17x+31\right)=\)

\(\displaystyle =\)[ ]\(\displaystyle x^{\,3}+\)[ ]\(\displaystyle x^{\,2}+\)[ ]\(\displaystyle x\,+\)[ ]