Question 643919
(2/3y^2-1/2)+(5/6y^2+3)


2/3y^2-1/2+5/6y^2+3


(2/3y^2+5/6y^2)+(-1/2+3)


(4/6y^2+5/6y^2)+(-1/2+6/2)


9/6y^2+5/2


<font color="red">3/2y^2+5/2</font>