She would like to serve the Countess Olivia, who is also mourning for a brother, but learns that she will not accept visitors. Instead Viola disguises herself as a boy and goes to work as a servant to Orsino. Calling herself Cesario, Viola makes a good impression on the Duke who sends her to woo Olivia on his behalf.
In the equation is shows a number to the left of a pair of parenthesis, which means that number will be multiplied to each number within those said parenthesis, resulting in the equation to the right.