So i graduated with good gpa in a civil engineering program in a school in Québec. Problem is, at that said school, programmable calculators were allowed and we abused it. Every single integrals or derivatives or complex number manipulation was solved by it and now i transfered to another graduate school in a engineering physics master program (course based) and they dont allow any form of programmable calculators. I'm currently studying lagragians and hamiltonians in before quantum mechanics and quantum optics for microfabrication (photoelectrochemical cells and stuff). But i simply cannot do anything without my calculator. Simply put, is it possible to rapidly grasp the maths for those topics or am i doomed to an undergraduate career in civil engineering... I been practicing for about 2-3 additional hours a day for 3 weeks now and i'm not even near where i want to be with hand derivatives and integrals. Anyone here who wasn't good at manually solving problems and picked it up for grad schools? Thanks alot.