Kemija - 2013./14. ljeto - 14.

$3{\mathrm{O}}_{3}3\; \backslash mathrm\{~O\}\_\{3\}$

$3\mathrm{O}3\; ~\backslash mathrm\{O\}$

$3{\mathrm{O}}_{2}3\; \backslash mathrm\{~O\}\_\{2\}$

$3{\mathrm{O}}_2{}^{2-}3\; \backslash mathrm\{~O\}\_\{2\}\{\}^\{2-\}$