Sub and Sup text examples

Sub and Sup text without using small tags

H₂0
0.212¹⁰
25^th December

Sub and Sup text using small tags

H₂0
0.212¹⁰
25^th December
Notice on the second set of examples by nesting the Sup and Sub, with the Small tags the elements actually look smaller than the text making it look more pleasing to the eye.