Question 16455
{{{(4y)*(y^2+3y+1)+3*(y^2+3y+1)}}}
{{{4y*y^2+4y*3y+4y*1+3*y^2+3*3y+3*1}}}
{{{4y^3+12y^2+4y+3y^2+9y+3}}}
{{{4y^3+12y^2+3y^2+4y+9y+3}}}
{{{4y^3+(12+3)y^2+(4+9)y+3}}}
{{{4y^3+15y^2+13y+3}}}