Find the sum of the three expressions and choose the correct answer.

-2u3v + 5uv - 1

7u3v - 2u2v2

5u2v2 - uv + 6

5 u3v + 3 u2v2 + 4 uv + 5
5 u3v - 3 u2v2 + 4 uv - 5
-5 u3v - 3 u2v2 + 4 uv + 7