Answer
4+21m
Explanation
Use the distributive property 4 times 1 and 4 times 7m keep the m
I didn’t understand but when I understand I will help you
Derivative Functions
The derivative function gives the derivative of a function at each point in the domain of the original function for which the derivative is defined. We can formally define a derivative function as follows.
Definition:
let f be a function. The derivative function, denoted by f', is the function whose domain consists of those values of x such that the following limit exists:

Answer:
The question isn't completely clear, but I believe that the answer would be 7m. That is the correct format.