#algebra 

If we have a contour $\LARGE \gamma$ starting in $\LARGE z_1$ and ending in $\LARGE z_2$, as well as a [[Holomorphic function|analytic]] function $\LARGE f(z)$, then:
![[Pasted image 20251025010812.png]]

Example:
![[Pasted image 20251025010900.png]]