Mathematic expression solver

This package contains the MathTool class and three demonstration programs to illustrate its usefullness including a simple scientific calculator, a simple expression solver, and a 2D graphing plot. The MathTool class included inputs a mathematical expression string (such as "1+1" or something like "3*exp(4)/(cos(pi)-1)") and processes it through a totally cool algorythm that sorts the parts by operators and parenthesis. Same concept if you were to type a math problem into Google Search.