math and uml

$$E=mc^2$$

$$\sum_{i=1}^n a_i=0$$
$$\sum ^ {j-1}{k=0}{\widehat{\gamma} {kj} z k } $$

$$
\Gamma(z) = \int_0^\infty t^{z-1}e^{-t}dt,.
$$

Alice->Bob: Hello Bob, how are you?
Note right of Bob: Bob thinks
Bob-->Alice: I am good thanks!