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\left(5a\right)^{3}+5^{-1}a^{-1}a^{2}
To multiply powers of the same base, add their exponents. Add 1 and -2 to get -1.
\left(5a\right)^{3}+5^{-1}a^{1}
To multiply powers of the same base, add their exponents. Add -1 and 2 to get 1.
5^{3}a^{3}+5^{-1}a^{1}
Expand \left(5a\right)^{3}.
125a^{3}+5^{-1}a^{1}
Calculate 5 to the power of 3 and get 125.
125a^{3}+\frac{1}{5}a^{1}
Calculate 5 to the power of -1 and get \frac{1}{5}.
125a^{3}+\frac{1}{5}a
Calculate a to the power of 1 and get a.
\left(5a\right)^{3}+5^{-1}a^{-1}a^{2}
To multiply powers of the same base, add their exponents. Add 1 and -2 to get -1.
\left(5a\right)^{3}+5^{-1}a^{1}
To multiply powers of the same base, add their exponents. Add -1 and 2 to get 1.
5^{3}a^{3}+5^{-1}a^{1}
Expand \left(5a\right)^{3}.
125a^{3}+5^{-1}a^{1}
Calculate 5 to the power of 3 and get 125.
125a^{3}+\frac{1}{5}a^{1}
Calculate 5 to the power of -1 and get \frac{1}{5}.
125a^{3}+\frac{1}{5}a
Calculate a to the power of 1 and get a.