Найдите разность многочленов:

\(\displaystyle \left(-13v^{\,4}-23v^{\,2}u\,\right)-\left(-16v^{\,4}+70v^{\,2}u\,\right)=\)[?||-][ ]\(\displaystyle v^{\,4}\)[?|+|-][ ]\(\displaystyle v^{\,2}u\)