Question 87301
{{{((5y-4) + (2y^2-8y))}}}

{{{((5y-8y -4 + 2y^2))}}} [combine like-terms]

{{{((-3y -4 + 2y^2))}}} 
{{{((2y^2-3y -4 ))}}}[arrange in descending order (exponents)]