1. The problem is to understand if I know how to differentiate functions in calculus. 2. Differentiation refers to finding the derivative of a function, which gives the rate at which the function's value changes with respect to a variable. 3. For example, if we have a function $f(x)=x^2$, its derivative is found by applying the power rule: $$\frac{d}{dx}x^2=2x$$. 4. This means for every increase of $x$ by 1, $f(x)$ increases approximately by $2x$ at that point. 5. I can help with differentiation of polynomial, exponential, logarithmic, trigonometric, and other functions, including rules like the product rule, quotient rule, and chain rule. 6. So yes, I know how to differentiate and can guide you through the process for any function you have.