\[1)\ f(x) = 5\sin x + 2\cos x;\]
\[F(x) = - 5\cos x + 2\sin x + C.\]
\[2)\ f(x) = 3e^{x} - \sin x;\]
\[F(x) = 3e^{x} + \cos x + C.\]
\[3)\ f(x) = 1 + 3e^{x} - 4\cos x;\]
\[F(x) = x + 3e^{x} - 4\sin x + C.\]
\[4)\ f(x) = \frac{4}{\sqrt{x}} + \frac{3}{x} - 2e^{x};\]
\[F(x) = 4 \bullet 2x^{\frac{1}{2}} + 3\ln|x| - 2e^{x} + C =\]
\[= 8\sqrt{x} + 3\ln|x| - 2e^{x} + C.\]