What is the order of $\frac{d^3y}{dx^3} + 2\frac{d^2y}{dx^2} - \frac{dy}{dx} = x$?

Explanation

1. 01

   The order is the order of the highest derivative in the equation.

2. 02

   The highest derivative here is $\frac{d^3y}{dx^3}$, so the order is 3.