heart attack -- n. a suddedn painful and dangerous condition in which your heart stops beating properly
tuition -- n. money that is paid to a school for the right to study there
entire -- adj. complete or full
focus -- v. to put most of your attention on a matter or subject
graduate -- n. a student who complete his or her studies at a school
core -- adj. the central or major issue
equation -- n. the issue at hand
guess -- v. to form an opinion or give an answer about something when you do not know much or anything about it