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\left(\frac{x^{-5}}{x^{2}y^{4}}\right)^{2}
Cancel out y^{2} in both numerator and denominator.
\left(\frac{1}{y^{4}x^{7}}\right)^{2}
To divide powers of the same base, subtract the numerator's exponent from the denominator's exponent.
\frac{1^{2}}{\left(y^{4}x^{7}\right)^{2}}
To raise \frac{1}{y^{4}x^{7}} to a power, raise both numerator and denominator to the power and then divide.
\frac{1}{\left(y^{4}x^{7}\right)^{2}}
Calculate 1 to the power of 2 and get 1.
\frac{1}{\left(y^{4}\right)^{2}\left(x^{7}\right)^{2}}
Expand \left(y^{4}x^{7}\right)^{2}.
\frac{1}{y^{8}\left(x^{7}\right)^{2}}
To raise a power to another power, multiply the exponents. Multiply 4 and 2 to get 8.
\frac{1}{y^{8}x^{14}}
To raise a power to another power, multiply the exponents. Multiply 7 and 2 to get 14.
\left(\frac{x^{-5}}{x^{2}y^{4}}\right)^{2}
Cancel out y^{2} in both numerator and denominator.
\left(\frac{1}{y^{4}x^{7}}\right)^{2}
To divide powers of the same base, subtract the numerator's exponent from the denominator's exponent.
\frac{1^{2}}{\left(y^{4}x^{7}\right)^{2}}
To raise \frac{1}{y^{4}x^{7}} to a power, raise both numerator and denominator to the power and then divide.
\frac{1}{\left(y^{4}x^{7}\right)^{2}}
Calculate 1 to the power of 2 and get 1.
\frac{1}{\left(y^{4}\right)^{2}\left(x^{7}\right)^{2}}
Expand \left(y^{4}x^{7}\right)^{2}.
\frac{1}{y^{8}\left(x^{7}\right)^{2}}
To raise a power to another power, multiply the exponents. Multiply 4 and 2 to get 8.
\frac{1}{y^{8}x^{14}}
To raise a power to another power, multiply the exponents. Multiply 7 and 2 to get 14.