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\left(-5\right)^{2}m^{2}\left(-2m\right)^{3}-\left(\frac{1}{2}m\right)^{2}\left(-2m\right)^{3}
Expand \left(-5m\right)^{2}.
25m^{2}\left(-2m\right)^{3}-\left(\frac{1}{2}m\right)^{2}\left(-2m\right)^{3}
Calculate -5 to the power of 2 and get 25.
25m^{2}\left(-2\right)^{3}m^{3}-\left(\frac{1}{2}m\right)^{2}\left(-2m\right)^{3}
Expand \left(-2m\right)^{3}.
25m^{2}\left(-8\right)m^{3}-\left(\frac{1}{2}m\right)^{2}\left(-2m\right)^{3}
Calculate -2 to the power of 3 and get -8.
-200m^{2}m^{3}-\left(\frac{1}{2}m\right)^{2}\left(-2m\right)^{3}
Multiply 25 and -8 to get -200.
-200m^{5}-\left(\frac{1}{2}m\right)^{2}\left(-2m\right)^{3}
To multiply powers of the same base, add their exponents. Add 2 and 3 to get 5.
-200m^{5}-\left(\frac{1}{2}\right)^{2}m^{2}\left(-2m\right)^{3}
Expand \left(\frac{1}{2}m\right)^{2}.
-200m^{5}-\frac{1}{4}m^{2}\left(-2m\right)^{3}
Calculate \frac{1}{2} to the power of 2 and get \frac{1}{4}.
-200m^{5}-\frac{1}{4}m^{2}\left(-2\right)^{3}m^{3}
Expand \left(-2m\right)^{3}.
-200m^{5}-\frac{1}{4}m^{2}\left(-8\right)m^{3}
Calculate -2 to the power of 3 and get -8.
-200m^{5}-\left(-2m^{2}m^{3}\right)
Multiply \frac{1}{4} and -8 to get -2.
-200m^{5}-\left(-2m^{5}\right)
To multiply powers of the same base, add their exponents. Add 2 and 3 to get 5.
-200m^{5}+2m^{5}
The opposite of -2m^{5} is 2m^{5}.
-198m^{5}
Combine -200m^{5} and 2m^{5} to get -198m^{5}.
\left(-5\right)^{2}m^{2}\left(-2m\right)^{3}-\left(\frac{1}{2}m\right)^{2}\left(-2m\right)^{3}
Expand \left(-5m\right)^{2}.
25m^{2}\left(-2m\right)^{3}-\left(\frac{1}{2}m\right)^{2}\left(-2m\right)^{3}
Calculate -5 to the power of 2 and get 25.
25m^{2}\left(-2\right)^{3}m^{3}-\left(\frac{1}{2}m\right)^{2}\left(-2m\right)^{3}
Expand \left(-2m\right)^{3}.
25m^{2}\left(-8\right)m^{3}-\left(\frac{1}{2}m\right)^{2}\left(-2m\right)^{3}
Calculate -2 to the power of 3 and get -8.
-200m^{2}m^{3}-\left(\frac{1}{2}m\right)^{2}\left(-2m\right)^{3}
Multiply 25 and -8 to get -200.
-200m^{5}-\left(\frac{1}{2}m\right)^{2}\left(-2m\right)^{3}
To multiply powers of the same base, add their exponents. Add 2 and 3 to get 5.
-200m^{5}-\left(\frac{1}{2}\right)^{2}m^{2}\left(-2m\right)^{3}
Expand \left(\frac{1}{2}m\right)^{2}.
-200m^{5}-\frac{1}{4}m^{2}\left(-2m\right)^{3}
Calculate \frac{1}{2} to the power of 2 and get \frac{1}{4}.
-200m^{5}-\frac{1}{4}m^{2}\left(-2\right)^{3}m^{3}
Expand \left(-2m\right)^{3}.
-200m^{5}-\frac{1}{4}m^{2}\left(-8\right)m^{3}
Calculate -2 to the power of 3 and get -8.
-200m^{5}-\left(-2m^{2}m^{3}\right)
Multiply \frac{1}{4} and -8 to get -2.
-200m^{5}-\left(-2m^{5}\right)
To multiply powers of the same base, add their exponents. Add 2 and 3 to get 5.
-200m^{5}+2m^{5}
The opposite of -2m^{5} is 2m^{5}.
-198m^{5}
Combine -200m^{5} and 2m^{5} to get -198m^{5}.