Convert PDF file to high fidelity word file

I have 25 math files that I need to convert to MS Word fully editable format while maintaining the equations and formatting exactly as it is in the PDF document. I expect this to be done through some software so should be done very quickly. Please find 2 sample files attached that need to be converted into word files. As a part of your bid, I need you to convert and send me these two files to show your capability in achieving this.