6, {[(6, 6%, 6%?, 6), = 6, 6 % = ...., √6=?, -6, +6, -6), 6-, 6}, -6}, (6), ½√6, √6, (-6, 6 , 6)., 6 =, ;(₫6(;()?, 6 }, [- 6, −6, —6, 6 %, (6)., + 6, \[6\], 6 = ..., …….(6)……, 6., (6) ……………..………………, •6