2. (30 points) Evaluate the integral by interpreting it in terms of areas: (1) ( 3 + 1/ 4-x2)dx (2 ) |x|dx 3. (30 points) Evaluate the integral: .9 x-1 TT /3 (1) (u -2) (u+ 3) du (2) dx (3) cscxcotxax x 1 / 4 4. (30 points) Evaluate the integral: 25 5 + 7x It/3 1 + (cos 0) 2 6 (1) dx (2) do (3) x - 4 dx 4 V. Jo (cos ( ) 2 5. (20 points) Evaluate the indefinite integral by substitution: at bx2 (1) dx V3ax + bx3 (2) / sec' xtanxdx