English: So, for each conductor this is a the distance repeated twice because one is here D 12 and D 16 they are same D 12 is equal to D 16 that is why here it is made it D 12 square D 12 square, but you have 6 conductors surrounding the central conductor you have the So, that is you have the 6 conductors right surrounding the central conductor you have the 6 conductors that is why D 12 square or power should be to the power 6 because each conductor if you consider 2 distance are same that is why written D 12 square rather than complicating that thing D 12 × D 16 ×D 2 3 ×D 34 like this.
Telugu: కానీ కేంద్ర కండక్టర్ చుట్టూ 6 కండక్టర్స్ ఉన్నాయి అందుకే {D12²}⁶ ప్రతి కండక్టర్ తీసుకుంటే 2 దూరాలు ఒకటే అందుకే D12×D16×D23×D34 అని క్లిష్టతరం(complicating)గా కాకుండా D12² అని రాశాము.