2- Integration Notation - The Indefinite Integral
The integral symbol, which is similar to some magical looking music note, is the following:
This is not to be considered in any way in the process of integrating. This just tells you what you're integrating for. Like, what the variable to take into the consideration is.
It will be the function that gives us a function that generally represents how much the function we're integrating for will change across intervals. Don't worry, it will make sense soon.