What about the inequality sign like

The signs mean lesser and greater than. = means equal (s). The signs will always look like they are eating the bigger value. For example:

12<29

Twelve is lesser than twenty-nine, or

29>12

Twenty-nine is greater than twelve.

An equation uses an equal sign

12+8=20

When you're using all of them, it can look like this:

1
This is read as "one is lesser than n which is lesser than 29". These can be used to determine the lengths of the sides of a triangle. In this case, n must be between 1 and 29 for it to be the side of a triangle.