Mệnh đề nào sau đây sai?

\(\int {\frac{1}{{2x + 1}}dx} = \frac{1}{2}\ln \left| {2x + 1} \right| + C\).

\(\int {\sin \left( {2x + 1} \right)dx = \frac{1}{2}\cos \left( {2x + 1} \right) + C} \).

\(\int {{e^{2x + 1}}dx = \frac{1}{2}{e^{2x + 1}} + C} \).

\(\int {{{\left( {2x + 1} \right)}^7}dx = \frac{{{{\left( {2x + 1} \right)}^8}}}{{16}} + C} \).