How to solve a mathematical formula passed via post [duplicate]

How to solve a mathematical formula passed via post [duplicate]

References

Reference NO 1

http://stackoverflow.com/questions/15187608/how-to-solve-a-mathematical-formula-passed-via-post

Reference NO 2

http://stackoverflow.com/questions/2853907/how-to-parse-math-expressions-in-c

Reference NO 3

http://math.stackexchange.com/questions/44704/how-to-study-math-to-really-understand-it-and-have-a-healthy-lifestyle-with-free

Reference NO 4

http://help.smartsheet.com/customer/portal/articles/775363-using-formulas

Reference NO 5

http://www.khanacademy.org/math/algebra/systems-of-eq-and-ineq/systems-word-problems/v/passing-trains

Reference NO 6

http://www.pearsonhighered.com/pirnottannenbaumpreview/assets/pdf/0321568036_Chapter05.pdf

Reference NO 7

http://docs.python.org/2/howto/functional.html

Reference NO 8

https://ispeakmath.wordpress.com/category/equations/