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\left(-a\right)^{3}\left(-a^{4}\right)
To multiply powers of the same base, add their exponents. Add 1 and 2 to get 3.
\left(-1\right)^{3}a^{3}\left(-1\right)a^{4}
Expand \left(-a\right)^{3}.
-a^{3}\left(-1\right)a^{4}
Calculate -1 to the power of 3 and get -1.
a^{3}a^{4}
Multiply -1 and -1 to get 1.
a^{7}
To multiply powers of the same base, add their exponents. Add 3 and 4 to get 7.
\left(-a\right)^{3}\left(-a^{4}\right)
To multiply powers of the same base, add their exponents. Add 1 and 2 to get 3.
\left(-1\right)^{3}a^{3}\left(-1\right)a^{4}
Expand \left(-a\right)^{3}.
-a^{3}\left(-1\right)a^{4}
Calculate -1 to the power of 3 and get -1.
a^{3}a^{4}
Multiply -1 and -1 to get 1.
a^{7}
To multiply powers of the same base, add their exponents. Add 3 and 4 to get 7.