Which expression is equivalent to
`\frac{40x^{-3}y^{5}}{8x^{-2}y^{-2}}`
for all values for `x` and `y` where the expression is defined?
5xy^7
5x^5y^7
5/xy^7
5y^7/x
`\frac{40x^{-3}y^{5}}{8x^{-2}y^{-2}}`
for all values for `x` and `y` where the expression is defined?
5xy^7
5x^5y^7
5/xy^7
5y^7/x