Question: Okay what did the three symbols that look like $s$ but quite longer mean and what do does does the other symbol that looks like two $s$'s inside the circle
1. The three symbols that look like longer $s$'s are called integral signs, written as $$\int$$.
2. These integral signs represent integration in calculus, which is a way to find areas under curves or accumulate quantities.
3. The symbol that looks like two $s$'s inside a circle is called a contour integral, often written as $$\oint$$.
4. The contour integral is used to integrate functions along a closed path or loop in the complex plane or vector fields.
5. In summary, $$\int$$ means integration over an interval, and $$\oint$$ means integration over a closed curve.