The video tutorial introduces a mini project to develop a better understanding of the stack data structure by creating an equation bracket validator. The project involves checking if the number of opening and closing round brackets in a user-input equation are equal. The tutorial provides examples of valid and invalid equations and suggests using a stack data structure to manage the brackets. The instructor encourages students to attempt solving the problem independently before discussing the solution in the next video.

Describe the scenario where an equation is considered invalid according to the text.

What steps should you take after implementing the bracket validator as per the teacher's instructions?