25*x^0 ((y^-1 )/ (5x^-1)) * 5^-1y^2
x^0 = 1
Y^-1 = 1/y
5x^-1 = 5/x
5^-1 = 1/5
= (25)*(1) ( (1/y) / (5/x) )*(1/5)y^2
(1/y) / (5/x) = (1/y) * (x/5) = x/(5y)
= (25)*(1) ( x/(5y) )*(1/5)y^2
= 25 * ( x/(5y) )*(1/5)y^2
= [25xy^2] / [25y]
= xy
