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\left(\frac{n^{5}}{n^{-2}}\right)^{-4}
To multiply powers of the same base, add their exponents. Add 4 and 1 to get 5.
\left(n^{7}\right)^{-4}
To divide powers of the same base, subtract the denominator's exponent from the numerator's exponent. Subtract -2 from 5 to get 7.
n^{7\left(-4\right)}
To raise a power to another power, multiply the exponents.
\frac{1}{n^{28}}
Multiply 7 times -4.
\left(\frac{n^{5}}{n^{-2}}\right)^{-4}
To multiply powers of the same base, add their exponents. Add 4 and 1 to get 5.
\left(n^{7}\right)^{-4}
To divide powers of the same base, subtract the denominator's exponent from the numerator's exponent. Subtract -2 from 5 to get 7.
n^{7\left(-4\right)}
To raise a power to another power, multiply the exponents.
\frac{1}{n^{28}}
Multiply 7 times -4.