Expression Evaluator

The program takes in mathematical expressions and evaluates them. Its a little bit more useful then a common calculator in that it handles variables. The look and feel is more towards a programming language. Simplified version of MathCad or Linux octave.

Example input:

apple = 12, orange = 7 (apple/2 + orange)*10

Example output:

130.0

Got rid of the privacy warning about app being too old and deemed incompatible with newer phones.