2.2.53 Derivatives and differentials
condition: Find the derivative of the function: \[ \left(2 \operatorname{tg} \frac{x}{2}+3 \sin \frac{x}{3}\right) \ln \frac{3 x+1}{3 x-1} \text {. } \]
Calculation of derivatives and differentials of first and higher orders of functions of one and many variables, including partial derivatives.