Question 1055484
{{{(4y^2-7y-5)+(2y^2+2y+1)-(5y^2-7y+6)=(4y^2+2y^2-5y^2)+(-7y+2y-(-7y))+(-5+1-6)}}}

{{{(4y^2-7y-5)+(2y^2+2y+1)-(5y^2-7y+6)=(y^2)+(-7y+2y+7y)+(-10)}}}
{{{(4y^2-7y-5)+(2y^2+2y+1)-(5y^2-7y+6)=(y^2)+(2y)+(-10)}}}
{{{(4y^2-7y-5)+(2y^2+2y+1)-(5y^2-7y+6)=y^2+2y-10}}}