Entering ordered pairs into the equation tool is not simple because the equation tool uses the comma (semicolon in some locations) to indicate column vectors. You type (2,3) and get a column vector.
1. If you never use column vectors or matrices, you can just turn off the column vector feature.
2. Normal ordered pairs - things like (2,3) - are best just entered in Word. They require no special formatting so the equation tool's formatting tools are not needed.