simplify `(y^2 + 7y+10)/(y+5)`

Explanation

`y^2+7y+10 = y^2+5y+2y+10=y(y+5)+2(y+5) = (y+2)(y+5)`

`:. (y^2+7y+10)/(y+5) = ((y+2)(y+5))/(y+5) = (y+2)`