- $ \\\int {\\\sin } xdx = - \\\cos x + C$ .
- $ \\\int {\\\ln } xdx = \\\frac{1}{x} + c$.
- $ \\\int {{e^x}} dx = {e^x} + C$.
- $ \\\int {\\\frac{1}{{{{\\\cos }^2}x}}} dx = \\\tan x + C$.