Thì bạn viết ra ri nè : 5^3
\(\frac{\left(-2\right)^3\cdot3^3\cdot5^3\cdot7\cdot8}{3\cdot5^3\cdot2^4\cdot42}\)
\(=\frac{\left(-2\right)^3\cdot3^3\cdot5^3\cdot7\cdot2^3}{3\cdot5^3\cdot2^3\cdot2\cdot6\cdot7}\)
\(=\frac{\left(-2\right)^3\cdot3^2}{2\cdot6}=\frac{2^2\cdot3^2}{-1\cdot6}=\frac{36}{-6}=-6\)
Vậy .....................