This is completely wrong. I am a recent graduate who is in stem and took up to calc 3. It is true you do learn notation but only what is necessary for the conce

This is completely wrong. I am a recent graduate who is in stem and took up to calc 3. It is true you do learn notation but only what is necessary for the concepts and math of the calculus classes. I've run into the same problem as the op and most of the notation that acts as a barrier isn't matrix operators or integrals but rather symbols used in proof or niche cases that might be prevalent in a specific field but not in general University math courses.