As an Electrical/Electronics Engineer, and a Math specialist, your MathCad equations project would be right up my alley. I've got over 8 years of experience which makes me intimately familiar with the software's ins and outs, and I promise you that accuracy is something I pride myself on in all dimensions of my works. This means, not only will I program your equations accurately, but also that the final version will be equally as neat and polished as your report.
With a strong grasp on Circuit Designing, Calculus, Differential Equations, Linear Algebra to name a few, MathCad is not just a part of my job but my most trusted tool. Your satisfaction is key to me so rest assured I won't be waiting for you to point out any errors - I'll double-check for them myself because debugging code shouldn't be any part of the equation (pun intended).
Lastly, let's talk about timeframes. Your requested 12-hour deadline is absolutely doable for me. In fact, I'll commit to having your math equations ready well before that to allow room for reviewing and revisions if needed. On top of everything, you get all these skills at an incredibly reasonable rate of $50. So why wait? Let's hit the start button on your project together!