{الْحَمْدُ لِلَّهِ الَّذِي هَدَانَا لِهَٰذَا وَمَا كُنَّا لِنَهْتَدِيَ لَوْلَا أَنْ هَدَانَا اللَّهُ ۖ}
*  Michael van Biezen channel on YouTube is a comprehensive channel that covers so many topics (beginning and intermediate level) in Physics and Math. It is a very helpful one to refresh ...