Evaluate
-x^{15}y^{21}
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-x^{15}y^{21}
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\left(-2\right)^{3}\left(x^{5}\right)^{3}\left(y^{7}\right)^{3}+7x^{15}y^{21}
Expand \left(-2x^{5}y^{7}\right)^{3}.
\left(-2\right)^{3}x^{15}\left(y^{7}\right)^{3}+7x^{15}y^{21}
To raise a power to another power, multiply the exponents. Multiply 5 and 3 to get 15.
\left(-2\right)^{3}x^{15}y^{21}+7x^{15}y^{21}
To raise a power to another power, multiply the exponents. Multiply 7 and 3 to get 21.
-8x^{15}y^{21}+7x^{15}y^{21}
Calculate -2 to the power of 3 and get -8.
-x^{15}y^{21}
Combine -8x^{15}y^{21} and 7x^{15}y^{21} to get -x^{15}y^{21}.
\left(-2\right)^{3}\left(x^{5}\right)^{3}\left(y^{7}\right)^{3}+7x^{15}y^{21}
Expand \left(-2x^{5}y^{7}\right)^{3}.
\left(-2\right)^{3}x^{15}\left(y^{7}\right)^{3}+7x^{15}y^{21}
To raise a power to another power, multiply the exponents. Multiply 5 and 3 to get 15.
\left(-2\right)^{3}x^{15}y^{21}+7x^{15}y^{21}
To raise a power to another power, multiply the exponents. Multiply 7 and 3 to get 21.
-8x^{15}y^{21}+7x^{15}y^{21}
Calculate -2 to the power of 3 and get -8.
-x^{15}y^{21}
Combine -8x^{15}y^{21} and 7x^{15}y^{21} to get -x^{15}y^{21}.
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