@Expand and simplify: (y+3)(y+1)
y+4y+3
y+3y+3
y+3y+4

@Expand and simplify: (y-4)(y-5)
y-9y+20
y+9y+20
y-9y-20

@Expand and simplify: (y-7)(y-6)
y-13y+42
y-13y-42
y-y+42

@Expand and simplify: (y+5)(y+2)
y+7y+10
y+5y+10
y+7y+7

@Expand and simplify: (y-9)(y+3)                                          
y-6y-27
y+6y+27
y+6y-27

@Expand and simplify: (y-4)(y-4)
y-8y+16
y+16
y-4y-16

@Expand and simplify: (y+1)(y-2)
y-y-2
y-3y-2
y+y+2

@Expand and simplify: (y+3)(y+4)
y+7y+12
y+4y+12
y+3y+12

@Expand and simplify: 4(y-2) - 3(y+1)
y-11
7y-11
7y-5

@Expand and simplify: 7(2w+2) - w(3w-1)
-3w+15w+14
12w+14
14-3w

@Expand and simplify: a(b-2) + 6(a+b)
ab+4a+6b
5a+7b
ab+8a+6b

@Expand and simplify: 2y(4+1) + 5(z+y)
15y+5z
10y+5z
6y+5yz

@Expand and simplify: 6y(y+2y) + 9(6+y)
18y+9y+54
12y+9y+54
27y+54

@Expand and simplify: 6t(t+4) + 3t(5+t)
6t+3t+39t
9t+39t
6t+3t+39

@Expand and simplify: 5(3-2) + z(z+1)
z+z+5
z+z+25
3z+5
