Index notation

Index notation is used to repesentent powers, for example

a² means a × a and here the index is 2

b³ means b × b × b and here the index is 3

c⁴ means c × c × c × c and here the index is 4

etc.

When there is a number in front of the variable:

4d² means 4 × d × d.

2e³ means 2 × e × e × e