Hi,
I am Professor of mathematics at university of Nis, and, of course, I am very good at calculus 3.
Please provide me problems, so I can give you the more precisely estimate of working time and price.
By the way, you can see on Google scholar page the list of my scientific papers in renowned math journals [login to view URL]
I am hope that you will hire me.
Best wishes, Dragan Rakic