Calculus 4c-4, Examples of Differential Equations of Second Order with Variable Coefficients, in particular Euler's Differential Equation and Applications of Cayley-Hamilton's Theorem

Be in nature. Being outdoors and in nature is one of the best ways to help you see the bigger picture. If you take time to stare at the vastness of the ocean or up at the sky, it’ll take you out of that small mindset and away from the shit that’s irrelevant.