Answer:
3 + x + xy + 3y + y² +y
Step-by-step explanation:
You have to have multiplied every number with every number in the other parentheses:
y · x = xy, y · y = y², y · 3 = 3y
1 · x = x, 1 · y = y, 1 · 3 = 3
Now, add the products together and simplify:
xy + y² + 3y + x + y + 3
3 + x + xy + 3y + y² +y <=== since no like terms can be combined, just
put them in alphabetical order for easier organization
