\({\int {\left( {\frac{{x + 2}}{{x + 4}}} \right)} ^2}{e^x}\) dx is equal to
1
\({e^x}\left( {\frac{x}{{x + 4}}} \right) + c\)
2
\({e^x}\left( {\frac{x +2}{{x + 4}}} \right) + c\)
3
\({e^x}\left( {\frac{x-2}{{x + 4}}} \right) + c\)
4
\(\left( {\frac{{2x{e^x}}}{{x + 4}}} \right) + c\)