Differential equations: order and degree

Direction: Consider the following for the next two (02)
items that follow:
Let ydx + (x – y³) dy = 0 be a differential
equation.

What are the order and degree, respectively, of the differential equation?

What is the solution of the differential equation?

For the following two (02) items: 

What is u + v equal to?

For the following two (02) items: