p_{9}=\left(\left(p_{0}\left(1-t\right)+p_{1}t\right)\left(1-t\right)+\left(p_{1}\left(1-t\right)+p_{2}t\right)t\right)\left(1-t\right)+\left(\left(p_{1}\left(1-t\right)+p_{2}t\right)\left(1-t\right)+\left(p_{2}\left(1-t\right)+p_{3}t\right)t\right)t
