This document introduces integration with limits. It shows how to integrate simple functions without limits and with limits. When integrating with limits, the function is integrated as normal and then the upper and lower limits are substituted and subtracted, with no need for the +c term. Several examples integrate functions from limits of 1 to various numbers to demonstrate this process. The key question asks to find the value of a if the integral of (2x + 6) from 0 to a equals 27.