IDNLearn.com provides a user-friendly platform for finding answers to your questions. Discover reliable answers to your questions with our extensive database of expert knowledge.

Hi! I have an math exam tomorrow and I really need you guys help.
[tex] \frac{1}{2} - \frac{2}{2} - \frac{4}{2} + ... + \frac{39}{2} + \frac{40}{2} [/tex]
please help!​