Найдите сумму многочленов:
\(\displaystyle \left(15xyz-3x^{\,2}y+7yz-14x^{\,2}y^{\,3}\right)+\left(-8x^{\,2}y^{\,3}-15yz+13x^{\,2}y+17xyz\,\right)=\)
\(\displaystyle =\)[?||-][ ]\(\displaystyle xyz\)[?|+|-][ ]\(\displaystyle x^{\,2}y\)[?|+|-][ ]\(\displaystyle yz\)[?|+|-][ ]\(\displaystyle x^{\,2}y^{\,3}\)