This document discusses limits and exercises for applying limits. It defines the limit concept using 隆 and 竜 and provides three examples of limit calculations: the limit as x approaches 3 of (x - 2), the limit as x approaches -2 of (3x + 1), and the limit as x approaches 1 of (2x + 7). It then gives three practice limit calculations to solve: the limit as x approaches 3 of (2x + 1) equals 7, the limit as x approaches -1 of (5x + 8) equals 3, and the limit as x approaches -1 of (x^2 - 1)/(x + 1) equals -2.