This question is so hard please help me

The indefinite integral below can be found in more than one way. First use the substitution method to find the indefinite integral. Then find it without using substitution. Check that your answers are equivalent. [ 7(7x +3) dx Use the substitution method to evaluate the integral. 7(7x+3) dx = Use another method to evaluate the integral. [7(7x + 3) dx = Are the two answers equivalent? O Yes O No