Math 1132 Worksheet 1Due: 1st discussion section in the week of Jan. 27thIntegration by Substitution (Review)Part 1: Compute the indefinite integral in three steps: (1) specify the substitutionu=?anddu=?, (2) rewrite the integralcompletelyin terms of the new variableu, (3) computethe new integral and express the final answer in terms of the original variable.Example. EvaluateZxx2+ 1dx.2. Evaluate