3 times f of x plus 2 times g of x. Now, this right over here, the derivative of the sum of two terms, that's going to be the same thing as the sum of the derivatives of each of the terms. So this is going to be the same thing as the derivative with respect to x of 3 times f of x plus the derivative with respect to x of 2 times g of x. Now, the derivative of a number, or I guess you could say a scaling factor, times a function. The derivative of a scalar times a function is the same thing as the scalar times the derivative of the function. What does that mean? Well, that just means that this first term right over here, that's going to be equivalent to 3 times the derivative with respect to x of f of x plus this part over here is the same thing as 2.