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Activity 1. Evaluate the following expressions using the fundamental principles of integration you learned in this section. Show the step by step process of your solution. 1. S (3 - 2x - x4) dx 2. S dx (x- 1)3 3. S(x2 - 1)x dx 4. S x dx (x2 + 1)3 5. J dx 6. S 3xdx 3x + 1 x2+2Activity 1. In this activity, you are required to integrate again the following expressions and show the details of your work. 1.11m:2 +b)2/3xdx 3_I5x_1dx 21+3