What is a simpler form of (-4m3–m+9) - (4m2+m-12)?

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. what distance from city a is the point where the truck and the car will meet?

Jose is going to use a random number generator 500500 times. each time he uses it, he will get a 1, 2, 3,1,2,3, or 44.