May someone please help me with this :)

Find two rational expressions that have the difference of 2-n/n-4

Atoy company is considering a cube or sphere-shaped container for packaging a new product. the height of the cube would equal the diameter of the sphere . compare the volume to surface area ratios of the containers. which packaging will be more efficient? for a sphere, sa =4πr²

Solve the system of equations y= 3/2 - 1, -x+ y =-3