In order to practice handling math equations in latex documents, it is a good idea to start with simple equations. We can describe addition of two varaibles as follows:

where a and b are the constant variables. If we want to describe subtraction of two variables, the formulation can be written as

For multiplication and division, corresponding formations can be written as

and

where we use two different types of formation for each operation. The multiplication and division operation must be calculated earlier than addition and subtraction. Hence, multiplication and division formulations are usually written simplified forms.