I think you may need to simply define the terms used after "calculus." I just did two things that oddly coincide with having read this comment. One, skipped a YT video that promised to simply explain calculus, and two, commented elsewhere:

"One thing that really scares me about the fall of the empire of my birth is, even if a revolution succeeded, not only who would be in charge, but would they actually understand large scale administration, distribution, logistics, of goods and finance? We've allowed ourselves to be so proudly uneducated for si long, because "There are professionals for that." Well, yes, but honest ones?“

Edit, because I should add, an honest one that actually will be appointed to the task.