5. [-/1 Points] DETAILS BERRAPCALC7 5.6.003. MY NOTES Find the indefinite integral. [ Hint: Use u = x2 + 4 and ( un du - 10 1 + 1 + C (n # -1).] (Use C for the constant of integration.) ( x 2 + 4 )5 x dx 6. [-/1 Points] DETAILS BERRAPCALC7 5.6.013. MY NOTES Find the indefinite integral by the substitution method or state that it cannot be found by our substitution formulas. (If it cannot be found by substitution, enter IMPOSSIBLE. Use C for the constant of integration.) (x8- 81) x 7 dix