I'm learning Complex Numbers by myself. I've already understood basics concepts, but now I have problems with plots/graphs.
For example, I don't know, how to plot:
(1) $|z-1|+|z+1|=4$
(2) $|z+1| - \Im z \leq 1$
(3) $\Re\left(\frac{1-z}{1+z}\right) = 1$
($z \in \mathbb{C}$)
These examples are from some problem set I'm learning from (it's for first year college students)
I would really appreciate your help. I don't want to get answers for these particular problems. I want to understand, how can I plot similar things.