How do I reduce (2i+2)/(1-i) with step-by-step please? I need a step by step answer on how to do this. What I've been doing is converting the top to $2e^{i(\pi/4)}$ and the bottom to $\sqrt2e^{i(-\pi/4)}$. I know the answer is $2e^{i(\pi/2)}$ and the angle makes sense but obviously I'm doing something wrong with the coefficients. I suspect maybe only the real part goes into calculating the amplitude but I can't be sure.

What about 
$$\frac{1+i}{1-i}=\frac{2\sqrt{2}(\sqrt{2}/2+i\sqrt{2}/2)}{\sqrt{2}(\sqrt{2}/2-i\sqrt{2}/2)}
=2\frac{e^{i\frac{\pi}{4}}}{e^{-i\frac{\pi}{4}}}=2e^{i\frac{\pi}{2}}=2i?$$
