For the rendered tutorials, see https://numpy.org/numpy-tutorials/. The goal of this repository is to provide high-quality resources by the NumPy project, both for ...
Simplification: BODMAS rule, approximation techniques ... weak topics and allocate extra time to practice them. Use online tutorials and coaching materials to gain a better understanding.
Determine your weak areas and set aside more time to work on them. To learn more, make use of coaching resources and online tutorials.