\[1)\ f(x) = \cos(3x + 4);\]
\[F(x) = \frac{1}{3}\sin(3x + 4) + C.\]
\[2)\ f(x) = \sin(3x - 4);\]
\[F(x) = - \frac{1}{3}\cos(3x - 4) + C.\]
\[3)\ f(x) = \cos\left( \frac{x}{2} - 1 \right);\]
\[F(x) = 2\sin\left( \frac{x}{2} - 1 \right) + C.\]
\[4)\ f(x) = \sin\left( \frac{x}{4} + 5 \right);\]
\[F(x) = - 4\cos\left( \frac{x}{4} + 5 \right) + C.\]
\[5)\ f(x) = e^{\frac{x + 1}{2}} = e^{\frac{x}{2} + \frac{1}{2}};\]
\[F(x) = 2e^{\frac{x + 1}{2}} + C.\]
\[6)\ f(x) = e^{3x - 5};\]
\[F(x) = \frac{1}{3}e^{3x - 5} + C.\]