Question 661901
starting with
-y(6x^3 - 7x^2y + xy^2 + 5y^3)
take one term at a time
-y(6x^3) is -6x^3y
-y(-7x^2y) is 7x^2y^2
-y(xy^2) is -xy^3
-y(5y^3) is -5y^4
combined
-6x^3y + 7x^2y^2 - xy^3 - 5y^4