Ta có: \(-\dfrac{3}{8}x^2z\cdot\dfrac{2}{3}xy^2\cdot z^2\cdot\dfrac{4}{5}x^2y\)
\(=\left(-\dfrac{3}{8}\cdot\dfrac{2}{3}\cdot\dfrac{4}{5}\right)\cdot\left(x^2\cdot x\cdot x^2\right)\cdot\left(y^2\cdot y\right)\cdot\left(z\cdot z^2\right)\)
\(=-\dfrac{1}{5}x^5y^3z^3\)