Question 10076
Simplify:

{{{2x(3-5x-2x^2) - (10x-5x^3)}}}  Apply the distributive property to the 1st set of parentheses.

{{{(6x-10x^2-4x^3) - (10x-5x^3)}}} Now collect like-terms.

{{{(5x^3-4x^3) - 10x^2 + (6x-10x)}}} Simplify.

{{{x^3 - 10x^2 - 4x}}}