Evaluate the indefinite integral 26 + 3 da by u substitution. a) Let u= b) Find the differential of u: du= dx c) Performing the substitution yields the integral (in terms of u): du (Write the coefficient in either integer or fractional form for the outside of integral.) d) Find the antiderivative of the above in terms of u. + C (Write the coefficient in either integer or fractional form.) e) Therefore, the antiderivative in terms of x, dx +C x6 + 3