Ответ:
18)
\( (\frac{1}{5})^2 a b^3 (-0.5)^2 a^5 b (-10)^3 = \frac{1}{25} a b^3 \frac{1}{4} a^5 b (-1000) = (\frac{1}{25} \frac{1}{4} -1000)a^{1+5}b^{3+1} = (\frac{1}{100} -1000)a^6b^4 = -10a^6b^4 \)18)
\( (\frac{1}{5})^2 a b^3 (-0.5)^2 a^5 b (-10)^3 = \frac{1}{25} a b^3 \frac{1}{4} a^5 b (-1000) = (\frac{1}{25} \frac{1}{4} -1000)a^{1+5}b^{3+1} = (\frac{1}{100} -1000)a^6b^4 = -10a^6b^4 \)