Question 625082
If you mean:
{{{((45x^0y^2)^-1)/(180x^-4y^-4)}}}
Do it one thing at a time.
x^0 = 1
{{{((45y^2)^-1)/(180x^-4y^-4)}}}
= {{{1/((45y^2)*(180x^-4y^-4))}}}
= {{{1/(45*180y^-2*y^-4)}}}
Multiply NUM and DEN by x^2y^4
= {{{x^2y^4/8100}}}