(x minus y) times (y minus x) quadratic times (y minus x) quartic

(x minus y) times (y minus x) quadratic times (y minus x) quartic

simple form
=(X-Y) × (X-Y) to the second power × (X-Y) to the fourth power
=(1 + 2 + 4) power of (X-Y)
=The 7th power of (X-Y)