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\frac{\left(-4\right)^{3}\left(x^{5}\right)^{3}\left(y^{-2}\right)^{3}}{x^{7}y^{-3}}
Expand \left(-4x^{5}y^{-2}\right)^{3}.
\frac{\left(-4\right)^{3}x^{15}\left(y^{-2}\right)^{3}}{x^{7}y^{-3}}
To raise a power to another power, multiply the exponents. Multiply 5 and 3 to get 15.
\frac{\left(-4\right)^{3}x^{15}y^{-6}}{x^{7}y^{-3}}
To raise a power to another power, multiply the exponents. Multiply -2 and 3 to get -6.
\frac{-64x^{15}y^{-6}}{x^{7}y^{-3}}
Calculate -4 to the power of 3 and get -64.
\frac{-64y^{-6}x^{8}}{y^{-3}}
Cancel out x^{7} in both numerator and denominator.
\frac{-64x^{8}}{y^{3}}
To divide powers of the same base, subtract the numerator's exponent from the denominator's exponent.
\frac{\left(-4\right)^{3}\left(x^{5}\right)^{3}\left(y^{-2}\right)^{3}}{x^{7}y^{-3}}
Expand \left(-4x^{5}y^{-2}\right)^{3}.
\frac{\left(-4\right)^{3}x^{15}\left(y^{-2}\right)^{3}}{x^{7}y^{-3}}
To raise a power to another power, multiply the exponents. Multiply 5 and 3 to get 15.
\frac{\left(-4\right)^{3}x^{15}y^{-6}}{x^{7}y^{-3}}
To raise a power to another power, multiply the exponents. Multiply -2 and 3 to get -6.
\frac{-64x^{15}y^{-6}}{x^{7}y^{-3}}
Calculate -4 to the power of 3 and get -64.
\frac{-64y^{-6}x^{8}}{y^{-3}}
Cancel out x^{7} in both numerator and denominator.
\frac{-64x^{8}}{y^{3}}
To divide powers of the same base, subtract the numerator's exponent from the denominator's exponent.