Math Formula Recognition OCR

We are looking for a professional to develop from scratch or use any third party library to create a math equation recognizer. - The library would take an image as input then output all equation in text found in the image in an array , euqations that belongs to same questions would be put into the same array. The image could contain multiple math questions. Sample output for a single formula could be something like: x^2=a+b+c, of course there would be more advanced equation involving integration differentiation etc. - The library needs be able to be called by PHP, with parameter to specify an input image path. - The library needs be able to recognize different kind of mathematics formulae including: Algebra Equations Inequalities Calculus Matrices - All images format will be math equations taken off from camera. Please download some samples here: [login to view URL] There is no need to recognize the text around the formula, however it should recognize formula printed off under different font/size. I have had several freelancers wasted my time. Only freelancers who can provide some sort of demo will be selected (even a really simple one will do) . Thank you!