a: \(=2x^2yz\cdot9x^2y^6z^2=18x^4y^7z^3\)
Bậc là 14
b: \(=-12x^2yz\cdot\dfrac{\left(-64\right)}{27}x^6y^3z^9=\dfrac{256}{9}x^8y^4z^{10}\)
bậc là 22
c: \(=5\cdot\left(-2\right)\cdot3\cdot x^2\cdot x\cdot y^2\cdot yz^3=-30x^3y^3z^3\)
Bậc là 9
d: \(=x^4y^6\cdot x^2yz=x^6y^7z\)
Bậc là 14
e: \(=-27x^6y^9\cdot\left(-x^3yz\right)\)
=27x^9y^10z
Bậc là 20
f: \(=\dfrac{-1}{6}\cdot\left(-2\right)\cdot x^2\cdot x^2y^2z\cdot x^2y^3=\dfrac{1}{3}x^6y^5z\)
Bậc là 12
g: \(=\dfrac{3}{4}\cdot\dfrac{16}{9}\cdot x^4y^5\cdot x^2y^3=\dfrac{4}{3}x^6y^8\)
Bậc là 14
h: \(=-\dfrac{1}{2}\cdot x^4y^3\cdot x^2y^3\cdot4x^2y^4z^2=-2x^8y^{10}z^2\)
Bậc là 20