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regex for math expressions watch

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    How could you write a single regex which would match inputs for both linear and quadratic expressions correctly? For example, the expressions: (2x + 40 + 40), (x^2 + 3x + 2), (x^2 + 4), (x^2 + 2x). I want it to work so that I can group all the numbers, not the letters. E.g., I have a regex that will do the above but only for quadratics. If I input 1x^2 + 3x + 2 into this regex "([+-]?\\d+)[Xx]2\\s*([+-]?\\d+)[Xx]\\s*([+-]?\\d+)\\s*=\\s*0" it will return 1, 3, 2.
 
 
 
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Updated: October 17, 2015
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