Evaluate ∫ (2x+1)(x²+x+1)² dx.

Options

• Option A

  (x²+x+1)⁴/4+C

• Option B

  (x²+x+1)³/3 + C

• Option C

  (x²+x+1)³+C

• Option D

  (x²+x+1)²/2+C