Simplify: (5y2+2y)−(2y2−y+3)(5y^2 + 2y) - (2y^2 - y + 3)(5y2+2y)−(2y2−y+3).
3y2+3y−33y^2 + 3y - 33y2+3y−3
3y2+y−33y^2 + y - 33y2+y−3
7y2+y+37y^2 + y + 37y2+y+3
3y2+3y+33y^2 + 3y + 33y2+3y+3