a, `A=(-6x^3zy)(3yx^2)=-12x^5y^2z`
Bậc `8`
b, `B=1/2x^2 . 1/3x^2y^3=1/6x^4y^3`
Bậc `7`
c, `C=-2xt^2.8x^3t^2=-16x^4t^4`
Bậc `8`
d, `D=(4xyz).(-7x^2yz^3)=-28x^3y^2z^4`
Bậc `9`
e, `E=5/7xy^2z.-1/7x^2y^3z=-5/14x^3y^5z^2`
Bậc `10`
f, `F=6y^5t^3.2/3xyt^2=4xy^6t^5`
Bậc `12`