Question 501738
{{{19x^-3y^-1/57x^-4y^-3}}}
Divide by 19
{{{x^-3y^-1/3x^-4y^-3}}}
Multiply NUM and DEN by x^4
{{{xy^-1/3y^-3}}}
Multiply by y^3
= {{{xy^2/3}}}