Помогите пожалуйста!!!
3 задание!!!

1)2/(3-y)²+1/[(3-y)(3+y)]=(6+2y+3-y)/[(3-y)²(3+y)]=(9+3y)//[(3-y)²(3+y)]
2)(y-3)²*(9+3y)//[(3-y)²(3+y)]=(9+3y)/(3+y)
3)2y/(y+3)+(9+y)/(3+y)=(2y+9+y)/(y+3)=3(y+3)/(y+3)=3