User:Sanaris

I am a scientist, advanced in chemistry, physics, mathematics, more especially in QM, optics, theoretical physics, theoretical astrophysics, optical biodiagnostics (medicine), in which I can give expert opinion.

$$\sum_{i=1}^n a_i - \sum_{i=1}^n b_i = a_1-b_1 + a_2-b_2 + \sum_{i=3}^n a_i - \sum_{i=3}^n b_i$$