Answer
$-\dfrac{x^6y^5}{7z^2}+\dfrac{x^3y^2}{7z}-\dfrac{x^3}{z^2}$
Work Step by Step
Divide each term of the dividend by the divisor to obtain:
$\require{cancel}
=\dfrac{x^6y^6}{-7yz^2}-\dfrac{x^3y^3z}{-7yz^2}+\dfrac{7x^3y}{-7yz^2}
\\=-\dfrac{x^6y^6}{7yz^2}+\dfrac{x^3y^3z}{7yz^2}-\dfrac{7x^3y}{7yz^2}
$
Cancel out common factors to obtain:
$\require{cancel}
\\=-\dfrac{x^6\cancel{y^6}y^5}{7\cancel{y}z^2}+\dfrac{x^3\cancel{y^3}y^2\cancel{z}}{7\cancel{y}\cancel{z^2}z}-\dfrac{\cancel{7}x^3\cancel{y}}{\cancel{7y}z^2}
\\=-\dfrac{x^6y^5}{7z^2}+\dfrac{x^3y^2}{7z}-\dfrac{x^3}{z^2}$
