In order to calculate equations, you have to specify the equation you want solved and specify what you want done to it. For example, you can put "X + 5 = 6" and then put "SOLVE X" and output would be "X = 1".
Capabilities and Limitations
Since this language is made solely for algebra, you can't make a hello world program, quine, or cat program. (at least, I think so)
If you have any implementations, feel free to put them here.