i just need simple answers no need a deatiled solution

Question 2. In this question you will explore integrals where multiple different u-substitutions are possible, and what might make you prefer one option over the other. (1) Be a hero and show that is possible to solve the following integral without u-substitution, but by expanding. 1 = (2+ 1)*(x +2) dr (2) Solve / using the u-substitution u = z + 2. (3) Solve / using the u-substitution u = z + 1. [Continued on next page] MAT136H5 F - FALL 2022 - WRITTEN ASSIGNMENT 2 [Continued from previous page] (4) Give a brief (1-3 sentence) explanation in your own words which of the methods (part 1, part 2, or part 3) you preferred using and why