Compute: {{MATH_23}} {{CMD_24}} Here it is not apparent that the chain rule is involved. However, if it was involved, perhaps a good guess for {{MATH_25}} would be {{MATH_26}} and then {{ENV_27}} Now we consider the integral we are trying to compute {{MATH_28}} and we substitute using our work above. Write with me {{ENV_29}} However, we cannot continue until each {{MATH_30}} is replaced. We know that {{ENV_31}} so now we may replace {{MATH_32}} {{MATH_33}} At this point, we are close to being done. Write {{ENV_34}} Now recall that {{MATH_35}}. Hence our final answer is {{MATH_36}} {{CMD_37}} {{CMD_38}}