make the parentheses of cases more beautiful
Follow the instructions from http://tex.stackexchange.com/questions/38930/ignoring-vertical-space-due-to-underbraces-in-cases-environment to reduce size of parenthesis by usage of \smash and \phantom.
Follow the instructions from http://tex.stackexchange.com/questions/38930/ignoring-vertical-space-due-to-underbraces-in-cases-environment to reduce size of parenthesis by usage of \smash and \phantom.