Simplify $(1-3i) + (2-i) + (2+i) + (1+3i)$.
The answer is 6
This is because (1 - 3i) + (2 - i) + (2 + i) + (1 + 3i) is equivelent to 1 - 3i + 2 - i + 2 + i + 1 + 3i, which simplifies to 6.
